西安毛子科技大学函数的求导法则XIDIAN UNIVERSITY例6设 =x+a"+α"(a>0)，求 y'(a")'= a"Ina解y'= a"xa"-l +ar" In a.axa-l +aa" Ina.a" In aSin.T例7设y=e",求"(e*)'=e*sin!解 y'= (e"*)=e"x.(sinxsin!Sin!x.cosx.coSe=e中xxx函数的求导法则 例6 设 ( 0), 求 a a x a x a y x a a a = + +  y  . 解 1 a a a y a x −  = ( ) ln x x a a a  = 1 ln a x a a a ax − +  ln ln x a x +  a a a a 例7 设 求 1 sin e x y = ， y  . 1 sin e x =  解 y  = 1 sin (e ) x  1 sin e x =  (sin 1 ) x  cos 1 x  1 ( ) x  = 1 sin 1 e cos x x  2 1 ( ) x  − ( )x x e e  =