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cmee_xj

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feixiaolin

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Integrate[(x-a)^(3/2)]=2/5*(x-a)^(5/2)
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A*4/3*E*sqrt(R)*2/5*[(10-a)^(5/2) - (a-a)^(5/2)]=50000
A*4/3*E*sqrt(R)*2/5*(10-a)^(5/2) =50000
2Â¥2014-03-13 22:59:00
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cmee_xj

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ÒýÓûØÌû:
2Â¥: Originally posted by feixiaolin at 2014-03-13 22:59:00
Integrate=2/5*(x-a)^(5/2)
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A*4/3*E*sqrt(R)*2/5*=50000
A*4/3*E*sqrt(R)*2/5*(10-a)^(5/2) =50000

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3Â¥2014-03-14 14:34:29
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feixiaolin

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3Â¥: Originally posted by cmee_xj at 2014-03-14 14:34:29
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5000*sqrt(2pi)=Integrate[exp(-z^2/2)z, {z, h, 100}] - Integrate[exp(-z^2/2)*h, {z, h, 100}]
5000*sqrt(2pi)=Integrate[exp(-x), {x, h, 100}] - h*Integrate[exp(-z^2/2), {z, h, 100}]
5000*sqrt(2pi)=[exp(-h^2/2) - exp(10000/2)] - sqrt(pi/2)*h*[erf(50*sqrt(2))-erf(h/sqrt(2))]

[ Last edited by feixiaolin on 2014-3-18 at 15:55 ]
4Â¥2014-03-14 15:24:45
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cmee_xj

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feixiaolin: ±à¼­ÄÚÈÝ 2014-03-18 15:57
[quote]4Â¥: Originally posted by feixiaolin at 2014-03-14 15:24:45
5000*sqrt(2pi)=Integrate - Integrate

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[ Last edited by feixiaolin on 2014-3-18 at 15:57 ]
5Â¥2014-03-18 14:48:43
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feixiaolin

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5000*sqrt(2pi)=[exp(-h^2/2) - exp(10000/2)] - sqrt(pi/2)*h*[erf(50*sqrt(2))-erf(h/sqrt(2))]
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6Â¥2014-03-18 15:57:42
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