Bài 1: 2 2 2 a) y 1 0 u 1 3 2 v 1 1 x u x y 1, v u v y u 9 u 2v 3 v 3 , , , , 1 1 1 1 ỉ 2 x x 1 2 2 2 x 1 x 1 2 2 x 1 2 b) log 2x 1 2 log 2x 1 4 0 1 log 2x 1 2 0 log 2x 1 2 0 1 log 2x 1 2 2 h̃ Ư ; 1 f 0 .f 0 2 2 2 y' 3 x 2mx m 1 y' 0 x 2mx m 1 0 3 1 2 x x 4 2 2 2 2 2 1 2 1 2 ' m m 1 0 m m 1 0 m m 5 0 m m 5 0 x x 4x x 16 1 21 1 21 m ; ; 2 2 . 2 x x 1 2 2 2 x 1 x 1 2 2 x 1 2 b) log 2x 1 2 log 2x 1 4 0 1 log 2x 1 2 0 log 2x 1 2 0 1 log 2x 1 2 2 h̃ Ư ; 1 f 0 .f 0 2 . 2 2 y' 3 x 2mx m 1 y' 0 x 2mx m 1 0 3 1 2 x x 4 2 2 2 2 2 1 2 1 2 ' m m 1 0 m m 1 0 m m 5 0 m m 5 0 x x 4x x 16 1 21 1 21 m ; ; 2 2 . Bài 1: 2 2 2 a) y 1 0 u 1 3 2 v 1 1 x u x y 1, v u v y u 9 u 2v 3 v 3 , , , , 1 1 1 1 ỉ