... Bài 1: a) ỉ y2 u x y2 1, v x y b) h̃ , 1 Ư log 2x 1 2x log 2x 1 4x 1 log 2x 1 2x 1 1 log2 2x 1 2x ... log 2x 1 2x 1 1 f f 2 u 3 1 v u v u 2v u v , , , 1 y' x 2mx m 1 y' x 2mx m ... 3 x1 x ' m m m m m2 m x1 x 4x1x 16 m m 21 21 m ; ; ...