(x-1分之2x - x+1分之x)×x分之x²-1=

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(x-1分之2x - x+1分之x)×x分之x²-1=

(x-1分之2x - x+1分之x)×x分之x²-1=
(x-1分之2x - x+1分之x)×x分之x²-1=

(x-1分之2x - x+1分之x)×x分之x²-1=

2x/(x-1)-x/(x+1)*x/(x²-1)/1
=【2x(x+1)/(x-1)(x+1)-(x-1)x/(x-1)(x+1)】÷(x²-1)*x/(x²-1)
=(3x+x²)/(x²-1)*x/(x²-1)
=(3x²+x³)/(x²-1)²
你是不是写错题目?我对此答案不是很有信心