导数法则和微分法则 (1(u+yy'=u'ty' d(utv=dutdv (2)(uvy'=u'vtuv' d(uv)=vdutudv (Cv)=Cy d(cy=Cdv (3)( uy vau-udv p 2 dy=yu'uy dx二、导数法则和微分法则 (1) (uv)=uv d(uv)=dudv (2) (uv)=uv+uv d(uv)=vdu+udv (Cv)=Cv d(Cv)=Cdv 2 (3)( ) v u v uv v u  −   = 2 ( ) v vdu udv v u d − = 2 ) 1 ( v v v   = − 2 ) 1 ( v dv v d = − (4) yx =yu ux  dy=yu ux dx