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11Â¥2015-05-27 04:59:22
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10Â¥: Originally posted by peterflyer at 2015-05-27 04:55:21
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Integral{sqrt(4-x^2)*dx}
=x*sqrt(4-x^2)-Integral{x*(-2*x)/*dx}
=x*sqrt(4-x^2)-Integral{[4-x^2-4)/*dx}
=x*sqrt(4-x^2)-Integral{sqrt(4-x^2)*dx}+Integral{4*d ...

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S=Integral{sqrt(4-x^2)*dx£¬-2£¬2}
=2*Integral{sqrt(4-x^2)*dx£¬0£¬2}
=2*Function{1/2*x*sqrt(4-x^2)+2*ArcSin(x/2), 0 , 2}
=4*ArcSin1
=4*¦Ð/2
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12Â¥2015-05-27 05:06:45
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13Â¥2015-05-27 08:10:01
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zhengyongyb

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6Â¥: Originally posted by leoyuleii at 2015-05-26 21:42:11
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leoyuleii

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14Â¥: Originally posted by zhengyongyb at 2015-05-27 08:43:06
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