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   sci.math.symbolic      Symbolic algebra discussion      10,432 messages   

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   Message 9,138 of 10,432   
   Nasser M. Abbasi to Nasser M. Abbasi   
   Re: Rubi 4.9.2 do not integrate Timofeev   
   18 Aug 16 21:28:05   
   
   From: nma@12000.org   
      
   On 8/18/2016 9:22 PM, Nasser M. Abbasi wrote:   
   >   
   > ii:=integrate(integrate(x*(1 - x^3)^(1/3),x),x);   
   > unparse(ii::InputForm)   
   >   
   >    "(2*x*log(((((-1)*x^3+1)^(1/3))^2+(-1)*x*((-1)*x^3+1)^(1/3)   
   x^2)/(x^2))+((-4)   
   >    *x*log((((-1)*x^3+1)^(1/3)+x)/x)+((-4)*x*3^(1/2)*atan((2*3^   
   1/2)*((-1)*x^3+1)   
   >    ^(1/3)+(-1)*x*3^(1/2))/(3*x))+(3*x^3+9)*((-1)*x^3+1)^(1/3))))/36"   
   >   
      
   opps, Sorry, copy paste mess up in the above. double integration.   
   Here it is corrected.   
      
   ii:=integrate(x*(1 - x^3)^(1/3),x);   
   unparse(ii::InputForm)   
      
      "(log(((((-1)*x^3+1)^(1/3))^2+(-1)*x*((-1)*x^3+1)^(1/3)+x^2)/   
   x^2))+((-2)*log   
      ((((-1)*x^3+1)^(1/3)+x)/x)+((-2)*3^(1/2)*atan((2*3^(1/2)*((-1   
   *x^3+1)^(1/3)+(   
      -1)*x*3^(1/2))/(3*x))+6*x^2*((-1)*x^3+1)^(1/3))))/18"   
      
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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