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duandian12: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2015-03-29 11:25:31
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Integral{t*[Lnt-Lnk+A*t+B*t^2+C*t^3]*dt }
      =Integral{t*Lnt-t*Lnk+A*t^2+B*t^3+C*t^4]*dt }
      =1/2*t^2*Lnt-1/4*t^2-1/2*Lnk*t^2+1/3*A*t^3+1/4*B*t^4+1/5*C*t^5
      =1/2*t^2*Lnt-[1/4+1/2*Lnk]*t^2+1/3*A*t^3+1/4*B*t^4+1/5*C*t^5
2Â¥2015-03-29 11:07:05
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duandian12

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2Â¥: Originally posted by peterflyer at 2015-03-29 11:07:05
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Integral{t**dt }
      =Integral{t*Lnt-t*Lnk+A*t^2+B*t^3+C*t^4]*dt }
      =1/2*t^2*Lnt-1/4*t^2-1/2*Lnk*t^2 ...

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3Â¥2015-03-29 11:25:24
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3Â¥: Originally posted by duandian12 at 2015-03-29 11:25:24
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duandian12

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ÒýÓûØÌû:
2Â¥: Originally posted by peterflyer at 2015-03-29 11:07:05
ÕâÊǸö¹ãÒå»ý·Ö°É£¬ºÃÏñÔÚ0µã´¦ÊÇ·¢É¢µÄ¡£ÎÒÏȰÑËüµÄ²»¶¨»ý·Ö¸ø³öÀ´°É¡£
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Integral{t**dt }
      =Integral{t*Lnt-t*Lnk+A*t^2+B*t^3+C*t^4]*dt }
      =1/2*t^2*Lnt-1/4*t^2-1/2*Lnk*t^2 ...

dlnx=[Lnt-Lnk+A*t+B*t^2+C*t^3]*dt  ? ºÃÏñ²»Ì«¶Ô°É¡£
lnx=[Lnt-Lnk+A*t+B*t^2+C*t^3],ÄѵÀdlnx=lnxdt ?
5Â¥2015-03-29 15:05:00
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