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³√27-√9+√1-(4/5)²=?
人气:232 ℃ 时间:2020-06-24 17:00:00
解答
27^(1/3)-9^(1/2)+(1-(4/5)^2)^(1/2)
=3-3+(1-16/25)^(1/2)
=(9/25)^(1/2)
=3/5
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