解方程:1/(x*x+11x-8)+1/(x*x+-8)+1/(x*x-3x-8)=0
问题描述:
解方程:1/(x*x+11x-8)+1/(x*x+-8)+1/(x*x-3x-8)=0
解方程:1/(x*x+11x-8)+1/(x*x+2x-8)+1/(x*x-3x-8)=0
答
用换元法
设x*x+11x-8=A然后再做