下列积分积分限均为0到1,不好打就省略了.
=∫(a-2√ax+x)dx
=a^2-2√a∫√xdx+∫xdx
=a^2-√a*2/3*x^3/2(x=0 x=1)+x^2/2(x=0 x=1)
=a^2-4/3a^2+a^2/2=a^2/6