【1/(x+1)+1/(x-1)】(x2-1) 分式化简.

问题描述:

【1/(x+1)+1/(x-1)】(x2-1) 分式化简.

【1/(x+1)+1/(x-1)】(x²-1)
=【1/(x+1)】*(x²-1)+【1/(x-1)】*(x²-1)
=x-1 + x+1
=2x