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数学
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求以曲线y=x^2-4x与y=3x围成的图形的面积
人气:137 ℃ 时间:2019-08-27 07:56:08
解答
∫[(2x-x^2)-(2x^2-4x)]dx=∫(6x-3x^2)dx
=3x^2-x^3|2,0=3*2^2-2^3-0=4
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