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8Â¥: Originally posted by feixiaolin at 2014-12-15 14:20:09
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flyman-1984(sweety´ú·¢): ½ð±Ò+2 2014-12-25 09:16:02
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feixiaolin

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y''=C1*sqrt(1+y'^2) + C2*2*s*sqrt(1+y'^2) + C3*3s^2*sqrt(1+y'^2)
s=Intgrate[sqrt(1+y'^2), {x=x_0, x}]
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3Â¥2014-12-15 12:58:56
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cooooldog

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2Â¥: Originally posted by wurongjun at 2014-12-15 11:41:29
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ÕâÓëÄã¸øµÄ±í´ïʽ²»Ïà·ûºÏ!
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dyi¼°dxi±íʾµÄÊDzî·ÖÂð!
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