개요
- integration by parts
- 부분적분법, 부분적분
<math>\displaystyle \int f(x)g'(x)\, dx = f(x)g(x) - \displaystyle \int f'(x)g(x)\, dx</math>
<math>\displaystyle \int_a^b f(x)g'(x)\, dx = [ f(x)g(x) ]_a^b - \displaystyle \int_a^bf'(x)g(x)\, dx</math>
<math>\displaystyle \int f(x)g'(x)\, dx = f(x)g(x) - \displaystyle \int f'(x)g(x)\, dx</math>
<math>\displaystyle \int_a^b f(x)g'(x)\, dx = [ f(x)g(x) ]_a^b - \displaystyle \int_a^bf'(x)g(x)\, dx</math>