(1)f(x) = ∫ g(x) dxf'(x) = g(x)(2)f(x) = ∫(0->x) g(t) dtf'(x) = g(x)(3)f(x) = ∫(x->x^2) g(t) dtf'(x) = 2x.g(x^2) -xg(x)(4)f(x) = ∫(a->b) g(x) dxf'(x) = 0
