【求助】根号下(X-5/X+2)的不定积分怎么做啊?
问题描述:
【求助】根号下(X-5/X+2)的不定积分怎么做啊?
答
令(x-5)/(x+2)=u²则x=(2u²+5)/(1-u²)dx=[(4u(1-u²)+2u(2u²+5)]/(1-u²)²du=14u/(1-u²)²du原式=∫14u²/(1-u²)²du=7/2∫[1/(1-u)²+1/(1+u)²-1/...