【x-1分之x²】-x-1计算

问题描述:

【x-1分之x²】-x-1计算

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