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化简:[1/(x-2)]- [2/(x的平方-4) ]÷[x/(x+2)],
人气:190 ℃ 时间:2020-04-07 22:30:22
解答
[1/(x-2)]-[2/(x^2-4)]/[x/(x+2)]
=[1/(x-2)]-2/[(x-2)x]
=(x-2)/[(x-2)x]
=1/x
疏璃妹子啊.乃还没睡啊..这都几点了、
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