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2除以根号3加根号2减1等于多少,
人气:288 ℃ 时间:2019-10-30 00:48:34
解答
2/(√3+√2)-1
=2*(3-√2)/(3+√2)(3-√2)-1
=2(3-√2)/1-1
=2√3-2√2-1
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