x2 t01 08 locus & complex nos 2 (2013)

47
Locus and Complex Numbers

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Page 1: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers

Page 2: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers , find the locus of or f z z

given some condition for or z

Page 3: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers , find the locus of or f z z

given some condition for or z(Make the condition the subject)

Page 4: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers

or 0arg,0Imrealpurely is

, find the locus of or f z z given some condition for or z(Make the condition the subject)

Page 5: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers

or 0arg,0Imrealpurely is

2

arg,0Reimaginarypurely is

, find the locus of or f z z given some condition for or z(Make the condition the subject)

Page 6: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers

or 0arg,0Imrealpurely is

2

arg,0Reimaginarypurely is

linear functionarg locus is an arc of a circlelinear function

, find the locus of or f z z given some condition for or z(Make the condition the subject)

Page 7: X2 t01 08  locus & complex nos 2 (2013)

Locus and Complex Numbers

or 0arg,0Imrealpurely is

2

arg,0Reimaginarypurely is

linear functionarg locus is an arc of a circlelinear function

2 if arcminor *

2 if arcmajor *

2 if semicircle *

, find the locus of or f z z given some condition for or z(Make the condition the subject)

Page 8: X2 t01 08  locus & complex nos 2 (2013)

4,2

2 if of locus theFind ..

zzwwige

Page 9: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

4,2

2 if of locus theFind ..

zzwwige

2 zzw

Page 10: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

4,2

2 if of locus theFind ..

zzwwige

2 zzw 21 wz

Page 11: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

4,2

2 if of locus theFind ..

zzwwige

2 zzw 21 wz

12

w

z

Page 12: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

4,2

2 if of locus theFind ..

zzwwige

2 zzw 21 wz

12

w

z

4

12

w

Page 13: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

4,2

2 if of locus theFind ..

zzwwige

2 zzw 21 wz

12

w

z

4

12

w

41

2

w

Page 14: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

4,2

2 if of locus theFind ..

zzwwige

2 zzw 21 wz

12

w

z

4

12

w

41

2

w

211 w

Page 15: X2 t01 08  locus & complex nos 2 (2013)

zzw 2

411 i.e.

21 radius and 1,0 centre circle, a is locus

22

yx

4,2

2 if of locus theFind ..

zzwwige

2 zzw 21 wz

12

w

z

4

12

w

41

2

w

211 w

Page 16: X2 t01 08  locus & complex nos 2 (2013)

realpurely is and 11 if of locus theFind w

zzwzii

Page 17: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

Page 18: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

Page 19: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww

Page 20: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

Page 21: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

Page 22: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

Page 23: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

Page 24: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

Page 25: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

Page 26: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

or 01arg1arg zzy

x

Page 27: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

or 01arg1arg zzy

x1-1

Page 28: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

or 01arg1arg zzy

x1-1

Page 29: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

or 01arg1arg zzy

x1-1

Page 30: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

or 01arg1arg zzy

x1-1

locus is 0, excluding 1,0y

Page 31: X2 t01 08  locus & complex nos 2 (2013)

iyx

iyxiyxiyxw

11

11

realpurely is and 11 if of locus theFind w

zzwzii

22

22

1111

yxyyxiyxix

0Im then realpurely is If ww 011.. yxyxei

0 yxyyxy

002

yy

locus is 0, excluding 1,0y

1 0,bottom of fraction 0 z

OR or 0argthen realpurely is If ww

or 011arg..

zzei

or 01arg1arg zzy

x1-1

locus is 0, excluding 1,0y : locus is 0, excluding 1,0 only

i.e. answer the original questionNote y

Page 32: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

Page 33: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

Page 34: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

Page 35: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x

Page 36: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

Page 37: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

Page 38: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

Page 39: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

Page 40: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

Page 41: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

Page 42: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

3260tan2

y

Page 43: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

3260tan2

y

32,2 is centre

Page 44: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

3260tan2

y

32,2 is centre

222 322 r

Page 45: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

3260tan2

y

32,2 is centre

222 322 r

4162

rr

Page 46: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

3260tan2

y

32,2 is centre

222 322 r

4162

rr

points. theseincludingnotbut 4,0 and 0,0 joining chordby the formed 16322

circletheofarcmajor theislocus22

yx

Page 47: X2 t01 08  locus & complex nos 2 (2013)

64

arg if of locus theFind

zzziii

64

arg

zz

6

4argarg zz

y

x4

6

axis below

4argarg

z-zNOTE:

2

(2,y)r

30

60tan2

y

3260tan2

y

32,2 is centre

222 322 r

4162

rr

points. theseincludingnotbut 4,0 and 0,0 joining chordby the formed 16322

circletheofarcmajor theislocus22

yx

Patel: Exercise 4N; 5, 6

Cambridge: Exercise 1F; 10 to 20

HSC Geometrical Complex Numbers Questions