定理1设∫f(n)dm=F(u)+c,则有 Sflp(x)ldo(x)=F((x)+C ∫8(x)=∫lp(x)lp(x)d=J)p(x) l=(x) If(u)du= F(u)+C=F((x)+C 说明:使用此公式的关键在于将 ∫g(x)dc化为∫g(x)p(x)t Economic-mathematics 48-5 Wednesday, February 24, 2021Economic-mathematics 48- 5 Wednesday, February 24, 2021  f[(x)](x)dx = f u du F u C u x ==== = +  = ( ) ( )  ( )  g(x)dx = 说明：使用此公式的关键在于将 化为 [ ( )] ( ) .  f  x  x dx  g(x)dx  f[(x)]d(x) = F((x)) + C. 定理1 设  f (u)du = F(u) + c，则有  f[(x)]d(x) = F((x)) + C