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化简:(1加a-2分之3)除以a平方-4分之a+1
人气:261 ℃ 时间:2019-11-08 14:16:52
解答
[1+3/(a-2)]除以(a+1)/(a^2-4)
=(a+1)/(a+2)除以(a+1)/(a+2)(a-2)
=(a+1)/(a+2)乘以(a+2)(a-2)/(a+1)
=a-2
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