求定积分,上线2,下线1,X^-3dX_数学解答

求定积分,上线2,下线1,X^-3dX

人气：376 ℃　时间：2020-04-24 20:14:51

解答

∫(1,2) x^(-3) dx
=(-1/2)x^(-2) | (1,2)
=(-1/2)[2^(-2)-1^(-2)]
=(-1/2)(-3/4)
=3/8