Subjects/Calculus II/Substitution method/Substitution in definite integralsSection 4.2Substitution in definite integralsWe can return to x before evaluating or change the limits directly:Copy LaTeX∫abf(g(x))g′(x)dx=∫g(a)g(b)f(u)du.View detail →Do not mix limits in x with an integrand written in u.
We can return to x before evaluating or change the limits directly:Copy LaTeX∫abf(g(x))g′(x)dx=∫g(a)g(b)f(u)du.View detail →