化简:[1/(x²-1)+1(x+1)] ÷2x/(1-x)

问题描述:

化简:[1/(x²-1)+1(x+1)] ÷2x/(1-x)

[1/(x²-1)+1(x+1)] ÷2x/(1-x)
=(1+x-1)/(x²-1)×(1-x)/2x
=-1/2(x+1);
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