phan loai phuong trinh mu - logarith

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Phương trình mũ - logarith luyện thi đại học

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Phn loi v phng php gii ton 12www.MATHVN.com www.MATHVN.com www.MATHVN.com www.MATHVN.comThs. L Vn on Chng II.Hm s mHm s ly thaHm s Logarit www.mathvn.com - 1 - HM S LY THA HM S M V HM S LOGARIT 2 22 2 Chng Bi 1:LY THA CC PHP TNH V LY THA VI HM S THC 1.Kin thc c bn Gi av bl nhng s thc dng,xvy l nhng s thc ty O . . .....na a a a a = Oxxxa ab b 1 =

( ) O .x y x ya a a=Oxyx ya a =O1xx y ny naa aa a = =O( )( ) 001 1 ,0uxux xx'111l= =! l l1 11+ O( ) ( ).y xx y xya a a = =O .n n na b ab =O( ). .xx xa b a b =G( )mn n ma a = 2.Lu Nu0 a < th xa ch xc nh khix . Nu1 ath a a . Nu0 1 a < 32n 1

( ) 5/ ( )5 1m < ( )5 1n6/ ( )2 1m < ( )2 1n Bi 4. C th kt lun g v c s a nu: 1/ ( ) ( )2 13 31 1 a a < 2/ ( ) ( )3 12 1 2 1 a a 3/ 0,221aa 1 <

( ) www.luyenthi24h.comwww.luyenthi24h.comPhn loi v phng php gii ton 12www.MATHVN.com www.MATHVN.com www.MATHVN.com www.MATHVN.comThs. L Vn on Chng II.Hm s mHm s ly thaHm s Logarit www.mathvn.com - 3 - 4/ ( ) ( )1 13 21 1 a a 5/ ( ) ( )3242 2 a a 6/ 1 12 21 1a a 1 1 ( ) ( ) 7/ 3 7a a < 8/ 1 117 8a a < 9/ 0,25 3a a