▽積分器 ●06/26 03:24 The indefinite integral of f (x)f x, denoted Start Integral, Start integrand, f (x) , integrand End,Start first variable, x , first variable End , Integral Endf xdx, is defined to be the antiderivative of f (x)f x. In other words, the derivative of Start Integral, Start integrand, f (x) , integrand End,Start first variable, x , first variable End , Integral Endf xdx is f (x)f x. Since the