计算(x/x-2 - x/x+2)除以4x/x2-4
3个回答
(x/x-2 - x/x+2)除以4x/x²-4
=(x²+2x-x²+2x)/(x²-4)÷[4x/(x²-4)]
=4x/(x²-4)÷[4x/(x²-4)]
=1
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