applied mat hemat ics stv gem s pub lic at ion s a pril 2 016 april 2016 aplied maths...applied mat...

21
d e i l p p A a m e h t a M s c i t s n o i t a c i l b u p s m e G V T S 1 6 1 0 2 L I R P A h h : 5 7 : B . N [ - T R A P f o h c a e n i s n o i t s e u q E V I F y n a r e w s n A ) 1 ( - T R A P & A - d n a B s n o i t s e u q h c a e f o s n o i s i v i d o w t y n a T R A P n i -C (2) h c a E s n o i t s e u q s k r a m ) o w t ( 2 s e i r r a c T R A P n i -A s k r a m ) e e r h t ( 3 , in T R A P - d n a B n i n o i s i v i d h c a e r o f s k r a m ) e v i f ( 5 T R A P -C ] . T R A P – A ( f f I . 1 x s i t a h w n e h t n o i t c n u f y t i s n e d y t i l i b a b o r p a s i ) f o e u l a v e h t ( ) ? 2 1 e r a n o i t u b i r t s i d l a i m o n i b a f o e c n a i r a v d n a n a e m e h t f I . 2 p d n i f , 6 d n a e l b a i r a v m o d n a r a f I . 3 X h c u s n o i t u b i r t s i d n o s s i o P s w o l l o f t a h t ( 1) 2 n a e m e h t d n i f , e h t f o n o i t a i v e d d r a d n a t s d n a n a e m e h t n w o d e t i r W . 4 n o i t u b i r t s i d l a m r o n d r a d n a t s t 5 = s f I . 5 2 + t 6 + y t i c o l e v l a i t i n i e h t d n i f , 5 e v r u c e h t o t l a m r o n f o e p o l s e h t d n i F . 6 y = x 3 , 4 ( t a –2) o e h t e t a t S . 7 f o e e r g e d d n a r e d r 2 7 2 2 2 0 : e v l o S . 8 ( 2 9 4 ) 0 T R A P – B y t i l i b a b o r p g n i w o l l o f e h t s a h X e l b a i r a v m o d n a r a f I . 9 ) X ( E d n i f , n o i t u b i r t s i d

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Page 1: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

1

6102 LIRPA

𝑒𝑚𝑖𝑇

𝑇

h

𝑒𝑒𝑟

h

𝑠𝑟𝑢𝑜

𝑚𝑢𝑚𝑖𝑥𝑎𝑀

𝑠𝑘𝑟𝑎𝑀

:

57

:B.N [ - TRAP fo hcae ni snoitseuq EVIF yna rewsnA )1( - TRAP &A - dna B

snoitseuq hcae fo snoisivid owt yna TRAP ni -C

(2 ) hcaE snoitseuq skram)owt(2 seirrac TRAP ni -A skram)eerht(3,

in TRAP - dna B ni noisivid hcae rof skram)evif(5 TRAP -C ].

TRAP – A

(f fI .1 x si tahw neht noitcnuf ytisned ytilibaborp a si )

fo eulav eht

𝑓

(

𝑥)

𝑥𝑑

?

21 era noitubirtsid laimonib a fo ecnairav dna naem eht fI .2

’p‘ dnif , 6 dna

‘ elbairav modnar a fI .3 X hcus noitubirtsid nossioP swollof ’ taht

𝑃(

𝑋

1)

𝑃

𝑋

2

� naem eht dnif ,

eht fo noitaived dradnats dna naem eht nwod etirW .4 noitubirtsid lamron dradnats

t5 = s fI .5 2 + t6 + yticolev laitini eht dnif ,5

evruc eht ot lamron fo epols eht dniF .6 y = x3 ,4( ta –2 )

o eht etatS .7 fo eerged dna redr

𝑑

𝑦

𝑑

𝑥�

2

7

𝑑

2

𝑦

𝑑

𝑥

2

2

𝑦

0

:evloS .8

(

𝐷

2

94

)

𝑦

0

TRAP – B

ytilibaborp gniwollof eht sah ’X‘ elbairav modnar a fI .9

)X(E dnif , noitubirtsid

Page 2: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

2

lamron fo seitreporp eerht yna noitneM .01 c evru

.11 fI x ea = t eb + –t lauqe syawla si noitarelecca eht taht wohS .

revo dessap ecnatsid eht ot

fo eulav muminim eht dniF .21 y = x 2 – 4x

:evloS .31

𝑥

𝑥𝑑

𝑦

𝑦𝑑

0

.41 fo rotcaf gnitargetni eht dniF

𝑦𝑑

𝑥𝑑

1

𝑥

𝑦

𝑥

.51 :evloS (

𝐷

2

5

𝐷

6)

𝑦

0

fo largetni ralucitrap eht dniF .61 (

𝐷

2

01

𝐷

1)

𝑦

𝑒

𝑥

TRAP - C

)a( .71 elbairav modnar A ’X‘ gniwollof eht sah ytilibaborp

noitubirtsid

𝑋

0 1 2 3

𝑃

𝑋

𝑥

1

3

1

6

1

6

1

3

)i( dniF

𝐸(

𝑋) dna

𝑖𝑖

𝐸(

𝑋

2) )b( elbairav modnar A ’X‘ gniwollof eht sah ytilibaborp

noitubirtsid

X 0 1 2 3 4

)x = X( P a a3 a5 a7 a9

)i( dniF )ii( dna ’a‘

𝑃

𝑋

2

X 1 2 3

P (X)

1

2

0

1

2

Page 3: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

3

)c( dna 51 = n fi ,noitubirtsid laimonib a nI

𝑃(

𝑋

1)

3

𝑃(

𝑋

0)

,

’p‘ fo eulav eht dnif fI )a( .81

%3 ,evitcefed era sblub cirtcele eht fo b 001 fo elpmas a ni taht ytilibaborp eht dnif sblu

( . evitcefed era sblub 5 yltcaxe

𝑒

3

0

.

8940

(b ) si naem noitubirtsid lamron a nI

01

dradnats dna

si noitaived

3

morf lavretni ytilibaborp eht dniF .

X ot 6.8 = X 8.21 =

)c( atad gniwollof eht rof enil thgiarts a tiF

)a( 91 nevig si elcitrap a fo noitauqe dellevart ecnatsid eht fI

yb noitarelecca eht taht wohS . t6 nis b + t6 soc a = s

ecnatsid sti sa seirav

)b( evruc eht ot stnegnat eht ot noitauqe eht dniF

y = x2 + x – ta 6 eht stuc ti erehw tniop eht x – sixa

fo seulav muminim dna mumixam eht dniF )c(

y 2 = x3 – 51 x2 – 63 x 81 +

esab fo enoc ralucric thgir a fo emulov eht dniF )a(.02

suidar

𝑟

′ thgieh dna

′ noitargetni gnisu yb

)b( :evloS

𝑛𝑎𝑡

𝑥

𝑒𝑠

𝑐

2

𝑦

𝑦𝑑

𝑛𝑎𝑡

𝑦

𝑒𝑠

𝑐

2

𝑥

𝑥𝑑

0

:evloS )c(

𝑦𝑑

𝑥𝑑

2

𝑦

𝑥

𝑥

2

𝑛𝑖𝑠

𝑥

:evloS )a( .12 (

𝐷

2

𝐷

2)

𝑦

0

:evloS )b( (

𝐷

2

8

𝐷

61 )

𝑦

2

𝑒

𝑥

:evloS )c( (

𝐷

2

61 )

𝑦

𝑛𝑖𝑠

9

𝑥

𝑥 0 1 2 3 4

𝑦 01 41 91 62 13

Page 4: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

4

TRAP - A

(f fI .1 x si tahw neht noitcnuf ytisned ytilibaborp a si )

fo eulav eht

𝒇

(

𝒙)

𝒙𝒅

?

ehT

eulav

fo

𝑓

(

𝑥)

𝑥𝑑

1

.2 21 era noitubirtsid laimonib a fo ecnairav dna naem eht fI

’p‘ dnif , 6 dna

neviG : naeM =

𝑝𝑛 21 = - - - - - )1(

= ecnairaV

𝑞𝑝𝑛 6 = - - - - - )2(

2

1

𝑞𝑝𝑛

𝑝𝑛

6

21

𝑞

1

2

𝒑

1

𝑞

1

1

2

𝟏

𝟐

3. ‘ elbairav modnar a fI X swollof ’ p hcus noitubirtsid nossio

taht

𝑷(

𝑿

𝟏)

𝑷

𝑿

𝟐

� naem dnif ,

:alumroF

𝑃(

𝑋

𝑥)

𝑒

𝜆

𝜆

𝑥

𝑥

!

neviG

𝑃(

𝑋

1)

𝑃

𝑋

2

𝑒

𝜆

𝜆

1

1

!

𝑒

𝜆

𝜆

2

2

!

𝜆

1

𝜆

2

2

2

1

𝜆

2

𝜆

𝜆

2

∴ naeM

2

SREWSNA

rewsnA

rewsnA

rewsnA

Page 5: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

5

4. etirW nwod eht naem fo noitaived dradnats dna

dradnats eht n noitubirtsid lamro

naeM

𝜇

0

noitaiveD dradnatS

𝜎

1

5. t5 = s fI 2 + t6 + yticolev laitini eht dnif ,5

:neviG t5 = s 2 + t6 + 5

v

𝑠𝑑

𝑡𝑑 = 5 ( t2 ) )1(6 + + 0 = 6 + t01

yticolev laitinI

v

� �

𝑠𝑑

𝑡𝑑 �

𝑡

=

0 = + )0(01 6 = ces / stinu 6

6 . fo epols eht dniF eht evruc eht ot lamron y = x3 ( ta 4 , –2)

:neviG y = x3

𝑦𝑑

𝑥𝑑

3

𝑥

2

𝑦𝑑

𝑥𝑑�

4

,

2

3(

4)

2

84

,tnegnat eht fo epolS m 84 =

,lamron eht fo epolS

1

𝑚

1

84

7 . fo eerged dna redro eht etatS

𝒅

𝒚

𝒅

𝒙�

𝟐

𝟕

𝒅

𝟐

𝒚

𝒅

𝒙

𝟐

𝒚𝟐

𝟎

redrO

2

dna

eergeD

1

.8 :evloS

𝑫

𝟐

𝟗𝟒

𝒚

𝟎

neviG (

𝐷

2

94

)

𝑦

0

si noitauqe yrailixuA

𝑚

2

94

0

𝑚

2

94

rewsnA

rewsnA

rewsnA

rewsnA

rewsnA

Page 6: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

6

𝑚

� √

94

7

∴ si noitulos ehT

𝑦

𝐴

𝑒

𝑚

1

𝑥

𝐵

𝑒

𝑚

2

𝑥

𝑦

𝐴

𝑒

7

𝑥

𝐵

𝑒

7

𝑥

TRAP - B

.9 ytilibaborp gniwollof eht sah ’X‘ elbairav modnar a fI

d noitubirtsi f , )X(E dni

:alumroF

𝐸

𝑋

𝑥

i

p

i

n

i

=

1

𝐸

𝑋

� =

𝑥

1

𝑝

1

𝑥

2

𝑝

2

𝑥

𝑛

𝑝

𝑛

= �

1

1

2�

(

2

0)

� �

3

1

2�

=

1

2

0

3

2

=

1

+

3

2

=

4

2

=

2

.01 noitneM yna eerht fo seitreporp n lamro c evru )i( . depahs lleb si evruc lamron ehT

)ii( . enil eht tuoba lacirtemmys si tI

𝑋

𝜇

.)iii( = edoM = naideM = naeM

𝜇

.11 fI s ea = t eb + –t . wohS eht taht syawla si noitarelecca

lauqe ecnatsid eht ot revo dessap

s :neviG = ea t eb + –t

X 1 2 3

P (X)

𝟏

𝟐

𝟎

𝟏

𝟐

rewsnA

rewsnA

rewsnA

Page 7: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

7

v

𝑠𝑑

𝑡𝑑 ea = t – eb –t { ecnis

𝑑

𝑡𝑑(

𝑒

𝑡)

𝑒

𝑡 }

𝑎

𝑑

2

𝑠

𝑑

𝑡

2 ea = t eb + –t

⇒ a s =

𝐴 noitarelecc revo dessap ecnatsid eht ot lauqe syawla si

.21 fo eulav muminim eht dniF y = x 2 – 4x

:neviG y = x 2 – 4x

y1 = 2x – 4

y2 = 2

tuP y 1 0 =

⇒ 2x – 0 = 4

2x 4 =

⇒ x = 2

woN (y2 ) x = 2 = 2 0 >

y si muminim ta x 2 =

ehT muminim fo eulav y )2( = 2 – )2(4

4 = – = 8 – 4

.31 evloS :

𝒙𝒅𝒙

𝒚𝒅𝒚

𝟎 G nevi

𝑥𝑑𝑥

𝑦𝑑𝑦

0

𝑥𝑑𝑥

𝑦𝑑𝑦

𝑥

𝑥𝑑

� �

𝑦

𝑦𝑑

𝑥

2

2

𝑦

2

2

𝐶

𝑥

2

2

𝑦

2

2

𝐶

rewsnA

rewsnA

Page 8: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

8

.41 fo rotcaf gnitargetni eht dniF

𝒚𝒅

𝒙𝒅

𝟏

𝒙

𝒚

𝒙

neviG

𝑦𝑑

𝑥𝑑

1

𝑥

𝑦

𝑥

mrof eht fo si sihT

𝑦𝑑

𝑥𝑑

𝑦𝑃

𝑄

,ereH

𝑃

1

𝑥

;

𝑄

𝑥

rotcaF gnitargetnI

𝑒∫

𝑥𝑑𝑃

𝑒∫

1

𝑥

𝑥𝑑

𝑒

gol

𝑥

𝑥 15. evloS : �

𝑫

𝟐

𝑫𝟓

𝟔�

𝒚

𝟎

neviG (

𝐷

2

5

𝐷

6)

𝑦

0

uqe yrailixuA a si noit

𝑚

2

5

𝑚

6

0

(

𝑚

2)(

𝑚

3)

0

𝑚

2

0

𝑚

3

0

𝑚

2

𝑚

3

∴ si noitulos ehT

𝑦

𝐴

𝑒

𝑚

1

𝑥

𝐵

𝑒

𝑚

2

𝑥

𝑦

𝐴

𝑒

2

𝑥

𝐵

𝑒

3

𝑥

16 . eht dniF p ralucitra i fo largetn

𝑫

𝟐

𝟎𝟏

𝑫

𝟏�

𝒚

𝒆

𝒙

neviG (

𝐷

2

01

𝐷

1)

𝑦

𝑒

𝑥

𝑃

.

𝐼

.

𝑒

𝑥

𝐷

2

01

𝐷

+

1

ecalpeR

𝐷

𝑦𝑏

1

𝑃

.

𝐼

.

𝑒

𝑥

1

2

01

1

1

rewsnA

rewsnA

rewsnA

Page 9: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

9

𝑃

.

𝐼

.

𝑒

𝑥

1

01

1

,

𝑃

.

𝐼

.

𝑒

𝑥

21

TRAP - C

(.71 a .) elbairav modnar A ’X‘ gniwollof eht sah

ytilibaborp noitubirtsid

𝑿

𝟎 1 2 3

𝑷

𝑿

𝟏

𝟑

𝟏

𝟔

𝟏

𝟔

𝟏

𝟑

)i( dniF

𝑬(

𝑿) dna

𝒊𝒊

𝑬�

𝑿

𝟐�

)i( :alumroF

𝐸

𝑋

𝑥

i

p

i

n

i

=

1

𝐸

𝑋

� =

𝑥

1

𝑝

1

𝑥

2

𝑝

2

𝑥

𝑛

𝑝

𝑛

= �

0

1

3�

1

1

6�

2

1

6�

� �

3

1

3�

=

0

1

6

2

6

1

=

1

+

2

+

6

6

=

9

6

3

2

𝑖𝑖

:alumroF

𝐸

𝑋

2

� ∑

𝑥

i

2

n

i

=

1

P

i

𝐸

𝑋

2

𝑥

1

2

𝑝

1

𝑥

2

2

𝑝

2

𝑥

𝑛

2

𝑝

𝑛

= �

0

2

1

3�

� �

1

2

1

6�

2

2

1

6�

3

2

1

3�

= �

𝟎

1

3�

� �

𝟏

1

6�

𝟒

1

6�

𝟗

1

3�

rewsnA

Page 10: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

01

=

0

1

6

4

6

3

=

1

+

4

+

81

6

=

32

6

.)b(.71 elbairav modnar A ’X‘ gniwollof eht sah

p ytilibabor noitubirtsid

X 0 1 2 3 4

P (X) a 3a 5a a7 9a

ii( dna ’a‘ )i( dniF )

𝑷

𝑿

𝟐

)i( taht wonk eW

𝑷

𝒊 1 =

a + 3a + 5a + a7 + 9 a 1 =

52 = a 1

⇒52

1a

)ii(

𝑃

𝑋

2

� = P (X = 2 + ) P (X = 3) + P (X = 4)

= 7+ a5 + a 9a

= 12 a

= 1252

1

5212

.)c(.71 noitubirtsid laimonib a nI fi , = n 51 dna

𝑷(

𝑿

𝟏)

𝟑

𝑷(

𝑿

𝟎)

,

dnif fo eulav eht ‘p’

neviG

𝑛

51

si noitubirtsid laimoniB

𝑷

(

𝑿

𝒙)

𝒄𝒏

𝒙

𝒑

𝒙

𝒒

𝒏

𝒙

𝑃

(

𝑋

𝑥)

51

𝑐

𝑥

𝑝

𝑥

𝑞

51

𝑥

rewsnA

rewsnA

Page 11: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

11

neviG

𝑷

(

𝑿

𝟏)

𝟑

𝑷(

𝑿

𝟎)

51

𝑐

1

𝑝

1

𝑞

51

1

3

51

𝑐

0

𝑝

0

𝑞

51

0

51

𝑝

𝑞

41

3

1

1

𝑞

51

51

𝑝

𝑞

41

3

𝑞

51

51

𝑝

3

𝑞

51

𝑝

3(

1

𝑝) [

𝑞

1

𝑝]

51

𝑝

3

3

𝑝

51

𝑝

3

𝑝

3

81

𝑝

3

𝑝

3

81

𝑝

1

6

.)a(.81 fI

𝟑

% ,evitcefed era sblub cirtcele eht fo

sblub 001 fo elpmas a ni taht ytilibaborp eht dnif

5 yltcaxe . evitcefed era sblub (

𝒆

𝟑

𝟎

.

𝟖𝟗𝟒𝟎

:alumroF

𝑃(

𝑋

𝑥)

𝑒

𝜆

𝜆

𝑥

𝑥

!

neviG

𝑃

%3

3

001

;

𝑛

001

taht wonk eW

𝜆

𝑃𝑛

001 �

3

001�

3

𝑃(

𝑋

𝑥)

𝑒

3(

3)

𝑥

𝑥

!

:evitcefed era 5 yltcaxE

𝑃

𝑋

5

𝑃(

𝑋

5)

𝑒

3(

3)

5

5

!

𝑃(

𝑋

5)

0

.

8940

342

021

0

.

8001

rewsnA

Page 12: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

21

.)b(.81 si naem noitubirtsid lamron a fI 𝟎𝟏 dradnats dna

si noitaived 𝟑 . morf lavretni ytilibaborp eht dniF

X = ot 6.8 X 8.21 =

,neviG naeM 𝜇 = 01

noitaiveD dradnatS 𝜎 = 3

taht wonk eW 𝑧 = 𝑋−𝜇𝜎

= 𝑋 − 01

3

P morf lavretni ytilibabor X = ot 6.8 X 8.21 =

𝑷( 𝟖. 𝟔 < 𝑋 < 𝟐𝟏 . 𝟖 )

nehW 𝑋 = 8.6 nehW 𝑋 = 21 .8

𝑧 =8.6 − 01

3 𝑧 =

21 .8 − 013

𝑧 =−1.4

3 𝑧 =

2.83

𝑧 = −0. 664 = −0. 74 𝑧 = 0. 339 = 0. 39

∴ 𝑷( 𝟖. 𝟔 < 𝑋 < 𝟐𝟏 . 𝟖 ) = 𝑷(−𝟎. 𝟕𝟒 < 𝑧 < 0. 39 )

−∞ 𝑧 = −0. 74 0 𝑧 = 0. 39 ∞

= 𝑃(−0. 74 < 𝑧 < 0) + 𝑃(0 < 𝑧 < 0. 39 )

= 𝑃(0 < 𝑧 < 0. 74 ) + 𝑃(0 < 𝑧 < 0. 39 )

= 0. 8081 + 0. 8323

= 𝟎. 𝟔𝟒𝟎𝟓

rewsnA

Page 13: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

31

)c(.81 atad gniwollof eht rof enil thgiarts a tiF

𝒙 0 1 2 3 4

𝒚 01 41 91 62 13

teL

𝑦

𝑥𝑎

𝑏

1

� tif tseb fo enil eht eb era snoitauqe lamron eht nehT

𝑎 ∑

𝑥

𝑖

𝑏𝑛

� ∑

𝑦

𝑖 .... )2(

𝑎 ∑

𝑥

𝑖

2

𝑏 ∑

𝑥

𝑖

� ∑

𝑥

𝑖

𝑦

𝑖 .... )3( etupmoc eW ∑

𝑖𝑥

, ∑

𝑥

𝑖

2

, ∑

𝑖𝑦

dna

𝑖𝑥

𝑖𝑦

.elbat gniwollof eht morf

𝑖𝑥

𝑖𝑦

𝑖𝑥

2

𝑖𝑦𝑖𝑥 0 01 0 0 1 41 1 14 2 91 4 83 3 62 9 87 4 13 61 1 42

𝒙

𝒊

01 ∑

𝒚

𝒊

001 ∑

𝒙

𝒊

𝟐

03 ∑

𝒙

𝒊

𝒚

𝒊

452 ,ereH

𝑛

5

teg ew ,snoitauqe lamron eht gnisU

)2(

𝒂 ∑

𝒙

𝒊

𝒃𝒏

� ∑

𝒚

𝒊

𝑎(

01 )

5

𝑏

001

01

𝑎

5

𝑏

001

)3(

𝑎 ∑

𝑥

𝑖

2

𝑏 ∑

𝑥

𝑖

� ∑

𝑥

𝑖

𝑦

𝑖

𝑎(

03 )

𝑏

01

452

03

𝑎

01

𝑏

452

: eluR s’remarC yB

01

𝑎

5

𝑏

001 dna

03

𝑎

01

𝑏

452

01

5

03

01 �

001

051

05

rewsnA

Page 14: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

41

𝑎

001

5

452

01 �

0001

0721

072

𝑏

01

001

03

452 �

0452

0003

064

𝑎

𝑎

072

05

𝟓

.

𝟒

,

𝑏

𝑏

064

05

𝟗

.

𝟐

)1(

𝑦

𝑥𝑎

𝑏

tuP

𝑎

5

.

4 dna

𝑏

9

.

2

𝒚

𝟓

.

𝟒

𝒙

𝟗

.

𝟐 .tif tseb fo enil eht si hcihw ,

�.91 .)a eht fI dellevart ecnatsid fo noitauqe nevig si elcitrap a

yb a = s soc + t6 b t6 nis . noitarelecca eht taht wohS

sa seirav ecnatsid sti

s t6 nis b + t6 soc a = –––– )1(

v

𝑠𝑑

𝑡𝑑

v a = { (– )t6nis 6 } b + { )t6 soc( 6}

v = – t6 soc b6 + t6nis a6

a

𝑑

2

𝑠

𝑑

𝑡

2

a = – a6 { )t6soc( 6 } b6 + {(– 6 )t6 nis }

a = – t6soc a63 – t6nis b63

a = – 63 { t6 nisb + t6soca }

a = – 63 {s} [ gnisu ])1(

a = – 63 { ecnatsiD }

.ecnatsid sti sa seirav noitarelecca

.)b(.91 noitauqe eht dniF fo stnegnat eht eht ot evruc

y = x2 + x – 6 ti erehw tniop eht ta eht stuc x – sixa

rewsnA

Page 15: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

51

y = x2 + x – 6

𝑦𝑑

𝑥𝑑

2

𝑥

1

evruc ehT y = x2 + x – 6 stuc x – sixa . tuP 0 = y

x2 + x – 6 0 = (x – 2 ( ) x + 3 0 = )

x – 0 = 2 x + 3 0 = x 2 = x = –3

( dna )0 ,2( – )0 ,3

)i( )0 ,2( ta tnegnat eht fo epolS

𝑦𝑑

𝑥𝑑�

2

,

0

2(

2)

1

5

𝑚

fo noitauqE eht ( ta tnegnat si )0 ,2 y – y1 = m ( x – x1)

ereH m = 5 , x1 ,2 = y1 0 =

y – = 0 5 (x –2)

y = 5x – 01

5x – y – 0 = 01

𝒊𝒊

( ta tnegnat eht fo epolS – )0 ,3

𝑦𝑑

𝑥𝑑�

3

,

0

2(

3)

1

5

𝑚

fo noitauqE eht ( ta tnegnat –3 si )0 , y – y1 = m (x – x1) ereH m = –5 , x1 = –3 , y1 0 =

y – = 0 –5 (x – (–3))

y = – 5 (x + )3

y = –5x – 51

5x + y 0 = 51 +

rewsnA

Page 16: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

61

.)c(.91 eht dniF fo seulav muminim dna mumixam

y = 2x3 – 51 x2 – 63 x 81 +

y 2 = x3 – 51 x2 – 63 x 81 +

y 1 2 = (3x2) – 51 (2x) – 63 (1) 0+

y1 6 = x2 – 03 x – 63

y2 6 = (2x) – 03 (1) – 0

y2 21 = x – 03

tuP y 1 0 =

⇒ 6x2 – 03 x – 0 = 63

nO teg ew ,6 yb x2 – 5x – 0 = 6

( x 1 + ( ) x – 6 0 = )

x + 1 0 = x – 6 0 =

x = – 1 x 6 =

esaC )i( : nehW x = – 1

[ woN y2] x =-1 (21 = – 1 ) – 03

= –1 2 – 03 = – 24 0 <

y ta mumixam si x = – 1

fo eulav mumixam ehT y (2 = – 1)3 – (51 – 1)2 – (63 – 1 81 + )

= – 2 – + 51 63 81 +

= 73

)ii( esaC : nehW x = 6

[ woN y2] x = 6 (21 = 6 ) – 03

= 27 – 03 = 24 0 >

rewsnA

Page 17: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

71

y ta muminim si x = 6

(2 = y fo eulav muminim ehT 6)3 – (51 6) 2 – 6(63 ) 81 +

(2 = 612 ) – (51 63 ) – 612 81 +

4 = 23 – 045 – 612 81 +

= – 603

.)a(.02 esab fo enoc ralucric thgir a fo emulov eht dniF

suidar ′𝒓′ thgieh dna ′𝒉′ noitargetni yb

thgir a gnitator yb demrof si enoc ralucric thgir A

tuoba elgnairt delgna 𝑥- sixa .

Y

𝒚 = 𝒙𝒎 r

𝑿′ x ) 0= 𝜃 ℎ M 𝑿

𝒀′

era stimil ehT 𝑥 = 0 dna 𝑥 = ℎ

∴ 𝑎 = 0 𝑑𝑛𝑎 𝑏 = ℎ

enil eht fo noitauqE 𝑨𝑶 si 𝒚 = 𝒙𝒎 … … …. (𝟏)

nI △ 𝑀𝐴𝑂 , nat 𝜃 =𝑝𝑝𝑜 . 𝑒𝑑𝑖𝑠𝑗𝑑𝑎 . 𝑒𝑑𝑖𝑠

rewsnA

Page 18: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

81

nat

𝜃

𝑟

𝑚

𝑟

ℎ ecnis

𝑚

nat

𝜃

(

1)

𝑦

� �

𝑟

��

𝑥

𝑒𝑚𝑢𝑙𝑜𝑉

𝑓𝑜

𝑒𝑛𝑜𝑐

𝜋 ∫

𝑦

2

𝑏

𝑎

𝑥𝑑

𝜋 � �

𝑥𝑟

� �

2

0

𝑥𝑑

𝜋 �

𝑟

2

𝑥

2

2

0

𝑥𝑑

𝜋

𝑟

2

2 �

𝑥

2

0

𝑥𝑑

𝜋

𝑟

2

2 �

𝑥

3

3�

0

𝜋

𝑟

2

2 �

3

3 �

𝜋

𝑟

2

3

𝑐𝑖𝑏𝑢𝑐

𝑠𝑡𝑖𝑛𝑢

.)b(.02 evloS :

𝒏𝒂𝒕

𝒙

𝒆𝒔

𝒄

𝟐

𝒚

𝒚𝒅

𝒏𝒂𝒕

𝒚

𝒆𝒔

𝒄

𝟐

𝒙

𝒙𝒅

𝟎

neviG

𝑛𝑎𝑡

𝑥

𝑒𝑠

𝑐

2

𝑦

𝑦𝑑

𝑛𝑎𝑡

𝑦

𝑒𝑠

𝑐

2

𝑥

𝑥𝑑

0

nat

𝑥

ces

2

𝑦

𝑦𝑑

nat

𝑦

ces

2

𝑥

𝑥𝑑

rewsnA

Page 19: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

91

ces

2

𝑦

nat

𝑦

𝑦𝑑

ces

2

𝑥

nat

𝑥

𝑥𝑑

ces

2

𝑦

nat

𝑦

𝑦𝑑

� �

ces

2

𝑥

nat

𝑥

𝑥𝑑

gol (

nat

𝑦)

gol

(

nat

𝑥)

gol

𝐶

gol (

nat

𝑦)

gol

(

nat

𝑥)

gol

𝐶

gol (

nat

𝑦

nat

𝑥)

gol

𝐶

nat

𝑦

nat

𝑥

𝐶

(.02 .)c evloS :

𝒚𝒅

𝒙𝒅

𝒚𝟐

𝒙

𝒙

𝟐

𝒏𝒊𝒔

𝒙

neviG

𝑦𝑑

𝑥𝑑

2

𝑦

𝑥

𝑥

2

nis

𝑥

mrof eht fo si sihT

𝑦𝑑

𝑥𝑑

𝑦𝑃

𝑄

ereH

𝑃

2

𝑥

,

𝑄

𝑥

2

nis

𝑥

rotcaF gnitargetnI

𝑒∫

𝑥𝑑𝑃

𝑒∫

2

𝑥

𝑥𝑑

𝑒

2 ∫

1

𝑥

𝑥𝑑

𝑒

2

gol

𝑥

𝑒

gol

𝑥

2

𝑥

2

1

𝑥

2

, si noitulos ehT

𝑦

𝑒∫

𝑥𝑑𝑃

� ∫

𝑄

𝑒∫

𝑃

𝑥𝑑

𝑥𝑑

C

𝑦

1

𝑥

2

� �

𝑥

2

nis

𝑥 �

1

𝑥

2�

𝑥𝑑

C

� �

nis

𝑥

𝑥𝑑

C

soc

𝑥

C

rewsnA

Page 20: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

02

.)a(.12 evloS : �

𝑫

𝟐

𝑫

𝟐�

𝒚

𝟎

neviG (

𝐷

2

𝐷

2)

𝑦

0

uqe yrailixuA a si noit

𝑚

2

𝑚

2

0

(

𝑚

1)(

𝑚

2)

0

(

𝑚

1)

0

(

𝑚

2)

0

𝑚

1

𝑚

2

si noitulos ehT

𝑦

𝐴

𝑒

𝑚

1

𝑥

𝐵

𝑒

𝑚

2

𝑥

𝑦

𝐴

𝑒

𝑥

𝐵

𝑒

2

𝑥

.)b(.12 evloS : �

𝑫

𝟐

𝑫𝟖

𝟔𝟏 �

𝒚

𝒆𝟐

𝒙

,neviG (

𝐷

2

8

𝐷

61 )

𝑦

2

𝑒

𝑥

si noitauqE yrailixuA

𝑚

2

8

𝑚

61

0

(

𝑚

4)(

𝑚

4)

0

𝑚

4

0

𝑚

4

0

𝑚

4

𝑚

4

, noitcnuF yratnemelpmoC

𝒙𝑨

𝑩

𝒆

𝒙𝒎

(

𝐶

.

𝐹)

� (

𝑥𝐴

𝐵)

𝑒

4

𝑥

largetnI ralucitraP

𝑒

𝑥𝑎

𝑓(

𝐷)

𝑃

.

𝐼

.

2

𝑒

𝑥

𝐷

2

8

𝐷

+

61

ecalpeR

𝐷

𝑦𝑏

1

𝑃

.

𝐼

.

2

𝑒

𝑥

1

2

8

1

61

𝑃

.

𝐼

.

2

𝑒

𝑥

1

8

61

rewsnA

rewsnA

Page 21: Applied Mat hemat ics STV Gem s pub lic at ion s A PRIL 2 016 APRIL 2016 aplied maths...Applied Mat hemat ics STV Gem s pub lic at ion s 2 10. Me nt ion an y thre e pro p ertie s of

deilppA amehtaM scit snoitacilbup smeG VTS

12

𝑃

.

𝐼

.

2

𝑒

𝑥

9

,noituloS lareneG

𝑦

𝐶

.

𝐹

𝑃

.

𝐼

𝑦

� (

𝑥𝐴

𝐵)

𝑒

4

𝑥

2

𝑒

𝑥

9

�.12 .)c evloS : �

𝑫

𝟐

𝟔𝟏 �

𝒚

𝒏𝒊𝒔

𝒙𝟗

neviG

(

𝐷

2

61 )

𝑦

𝑛𝑖𝑠

9

𝑥

si noitauqe yrailixuA

𝑚

2

61

0

𝑚

2

61

𝑚

� √

61

𝑚

𝑖

4

,ereH

𝛼

0

,

𝛽

4

∴ noitcnuf yratnemelpmoC

𝒆

𝒙𝜶

𝑨

𝒔𝒐𝒄

𝒙𝜷

𝒏𝒊𝒔𝑩

𝒙𝜷

𝐶

.

𝐹

𝑒

0

𝑥

𝑠𝑜𝑐𝐴

4

𝑥

𝑛𝑖𝑠𝐵

4

𝑥

𝑠𝑜𝑐𝐴

4

𝑥

𝑛𝑖𝑠𝐵

4

𝑥

𝑟𝑎𝑙𝑢𝑐𝑖𝑡𝑟𝑎𝑃

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