分式的计算 (x²/x-1)-x-1

问题描述:

分式的计算 (x²/x-1)-x-1

(x²/x-1)-x-1
=(x²/x-1)-(x+1)
=(x²-(x-1)(x+1))/(x-1)
=(x²-x²+1)/(x-1)
=1/(x-1)