미분법의 곱법칙(product rule)에 대응되는 부분적분법(integration by parts, IBP)을 알아보자. ※ The IBP [1] Suppose that u(x) and v(x) are differentiable functions.[2] The product rule in terms of differentials gives us: d(uv)=udv+vdu [3] Rearranging the rule, we can write: udv=d(uv)-vdu [4] Integrating both sides with respect to x: ∫udv=uv-∫vdu (integration by parts formula) 부정적분 부분적분 ■ IBP에서 핵심적인 사항은 u와 dv를 적절하게 선..
