∫
Integration by Substitution
★★★★☆Undergraduate
📖Definition
The reverse of the chain rule, simplifying complex integrals.
📐Formulas
∈t f(g(x)) · g'(x) dx = ∈t f(u) du
Substitution formula (u = g(x))
✏️Examples
예제 1★★★☆☆
Find ∫ 2x·e^(x²) dx.
예제 2★★★☆☆
Find ∫ cos(3x) dx.
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