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数学
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计算(x/4)^2 + ((20-x)/x)^2 =12
人气:353 ℃ 时间:2020-05-21 07:31:27
解答
(x/4)^2 + ((20-x)/x)^2 =12
(x^2/16)+(x^2-40x+400)/x^2=12
我做不下去了阿.抱歉
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