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8Â¥: Originally posted by ¼¤Àø¼ªÀû at 2012-10-09 17:50:52
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11Â¥2012-10-11 18:17:22
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2Â¥: Originally posted by dingd at 2012-10-08 15:56:55
ÏÈÇó»¡Î¢·Ö£¬ÔÙ»ý·Ö¾Í¿ÉÒÔÁ˰ɣ¬Èç: y=10*sin(0.5*x+3)
1: Ò»½×µ¼Êý£ºy'=10*(cos(0.5*x+3)*0.5)
2: »¡Î¢·Ö£ºds=sqrt(1+y'^2)*dx
3: Èçx=£¬¶Ôds¶¨»ý·Ö¿ÉµÃ£ºs=7.57887990220783

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12Â¥2012-10-12 19:43:09
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6Â¥: Originally posted by Pchief at 2012-10-09 09:26:02
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13Â¥2012-10-12 19:44:11
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