作业帮【1/(x+1)+1/(x-1)】(x2-1) 分式化简.
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【1/(x+1)+1/(x-1)】(x2-1) 分式化简.
【1/(x+1)+1/(x-1)】(x2-1) 分式化简.
【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
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