求有理函数积分:①∫x^4/(x-1)^3dx ②∫1/x^2(1+2x)dx ③∫x/x^3-x^2+x-1dx.

问题描述:

求有理函数积分:①∫x^4/(x-1)^3dx ②∫1/x^2(1+2x)dx ③∫x/x^3-x^2+x-1dx.