常用的几种凑微分的形式: (Jf(ax+bx=(B)d(ax+B) 2)jfx"xd=J/cx")d” 万 (3dx 凑幂 (4)∫(sincox=∫f(sinx)dsin ()⑤∫f(cosx)sind=-∫f(cosx)dcosx常用的几种凑微分的形式: + = (1) f (ax b)dx d(ax + b) a 1 = − f x x x n n (2) ( ) d 1 n dx n 1 = x x f x n d 1 (3) ( ) n dx n 1 n x 1 万 能 凑 幂 法 = (4) f (sin x)cos xdx dsin x = (5) f (cos x)sin xdx − dcos x