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分式计算!先化简 再求值.
{3a/(a-1)-2/(a+1)*(a^2-1)/a 其中a=根号3
人气:342 ℃ 时间:2020-09-30 13:51:02
解答
=3a/(a-1)-2/(a+1)*(a-1)(a+1)/a
=3a/(a-1)-2a/(a-1)
=a/(a-1)
=根号3(根号3+1)/2
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