Question

怎样理解积分中的导数？

Answer 1

g'(x) = f(x)
从a到ab f（x）的积分 = g(ab) - g(a)
g(ab) - g(a) 与a无关，
d(g(bx) - g(x))/dx = 0
g'(bx)*b - g'(x) = 0
g'(t)*t -g'(1) = 0
g'(t) = g'(1)/t
f(x) = g'(x) = C/x. (C=g'(1))