图片识别成文本： Let A, B, and A* be n(n 3) order non-zero matrix, and AB=0, find r(B).
2021-08-02 20:56
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2021-08-02 20:53
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回答图片识别成文本： Let the plane figure A be modified by x'+y's2x and y2x, what is the formula for the volume of the body of rotat... 查看全部
2021-08-02 20:50
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回答Find the particular solution form of the differential equation y"-4y'=x2 +cos2x.
2021-08-02 20:46
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回答图片识别成文本： A function(1) in (0, +) is the second order continuous differentiable, function a-c=f(vx+y) meet the ax2, 0, if... 查看全部
2021-08-02 19:17
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2021-08-02 19:16
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回答Let the function f(x)(x≥0) continuously differentiable, f(0)=1, and given that the area value of the graph enclosed by t... 查看全部
2021-08-02 17:39
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回答图片识别成文本： Set X1, X2..., Xn is simple random sample of the population X from the interval [0, 0+1], which is uniformly di... 查看全部
2021-07-20 14:51
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2021-07-20 14:50
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2021-07-20 14:48
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