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>> syms t
>> diff(-0.000000000216555 *t.^6+0.000000010399552 *t.^5+0.000001037995352 *t.^4-0.000080553437172 *t.^3+0.001572861417838 *t.^2+0.007249825838703 *t+0.103323003228512,'t',1)

ans =

-25132697363198019/19342813113834066795298816*t^5+15715358656531195/302231454903657293676544*t^4+4901794459659279/1180591620717411303424*t^3-17831383677234309/73786976294838206464*t^2+3626771504783691/1152921504606846976*t+8358480114095059/1152921504606846976

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4Â¥2011-02-14 23:40:45
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meiyangyang(½ð±Ò+1):лл²ÎÓë
meiyangyang(½ð±Ò+8): лл¹Ø×¢¡£ 2011-04-26 19:00:27
ÒýÓûØÌû:
Originally posted by meiyangyang at 2011-02-14 20:03:17:
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>> syms t
>> diff(-0.000000000216555 *t.^6+0.000000010399552 *t.^5+0.000001037995352 *t.^4-0.000080553437172 *t.^3+0.001572861417838 *t.^2+0.007249825838703 *t+0.10332300322851 ...

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              -8  5              -7  4              -5  3                2
  -0.129933 10   t  + 0.519978 10   t  + 0.415198 10   t  - 0.000241660 t

         + 0.00314572 t + 0.00724983
±íʾ:
-0.129933 * 10^(-8) * t ^ 5  + 0.519978 * 10 ^ (-7) * t ^ 4  + 0.415198* 10 ^(-3) * t ^ 3  - 0.000241660 * t ^ 2 + 0.00314572* t + 0.00724983

[ Last edited by xiegangmai on 2011-2-14 at 21:59 ]
2Â¥2011-02-14 21:51:16
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meiyangyang

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ÒýÓûØÌû:
Originally posted by xiegangmai at 2011-02-14 21:51:16:


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