부정적분 ᄉᄇ 1 / (9-4x^2) dx=

부정적분 ᄉᄇ 1 / (9-4x^2) dx=

교환, 명령 u = 2x,
₩1 / (9-4x^2)dx = (1/2) ₩1 / (9- u^2) du
= (1/2) * arcsin(u/3) + C
= (1/2) * arcsin(2x/3) + C