Integrand size = 13, antiderivative size = 35 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=-\frac {1}{3 a x^3}-\frac {b \log (x)}{a^2}+\frac {b \log \left (a+b x^3\right )}{3 a^2} \]
[Out]
Time = 0.02 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.154, Rules used = {272, 46} \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=\frac {b \log \left (a+b x^3\right )}{3 a^2}-\frac {b \log (x)}{a^2}-\frac {1}{3 a x^3} \]
[In]
[Out]
Rule 46
Rule 272
Rubi steps \begin{align*} \text {integral}& = \frac {1}{3} \text {Subst}\left (\int \frac {1}{x^2 (a+b x)} \, dx,x,x^3\right ) \\ & = \frac {1}{3} \text {Subst}\left (\int \left (\frac {1}{a x^2}-\frac {b}{a^2 x}+\frac {b^2}{a^2 (a+b x)}\right ) \, dx,x,x^3\right ) \\ & = -\frac {1}{3 a x^3}-\frac {b \log (x)}{a^2}+\frac {b \log \left (a+b x^3\right )}{3 a^2} \\ \end{align*}
Time = 0.01 (sec) , antiderivative size = 35, normalized size of antiderivative = 1.00 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=-\frac {1}{3 a x^3}-\frac {b \log (x)}{a^2}+\frac {b \log \left (a+b x^3\right )}{3 a^2} \]
[In]
[Out]
Time = 3.72 (sec) , antiderivative size = 32, normalized size of antiderivative = 0.91
method | result | size |
default | \(-\frac {1}{3 a \,x^{3}}-\frac {b \ln \left (x \right )}{a^{2}}+\frac {b \ln \left (b \,x^{3}+a \right )}{3 a^{2}}\) | \(32\) |
norman | \(-\frac {1}{3 a \,x^{3}}-\frac {b \ln \left (x \right )}{a^{2}}+\frac {b \ln \left (b \,x^{3}+a \right )}{3 a^{2}}\) | \(32\) |
parallelrisch | \(-\frac {3 b \ln \left (x \right ) x^{3}-b \ln \left (b \,x^{3}+a \right ) x^{3}+a}{3 a^{2} x^{3}}\) | \(33\) |
risch | \(-\frac {1}{3 a \,x^{3}}-\frac {b \ln \left (x \right )}{a^{2}}+\frac {b \ln \left (-b \,x^{3}-a \right )}{3 a^{2}}\) | \(35\) |
[In]
[Out]
none
Time = 0.26 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.94 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=\frac {b x^{3} \log \left (b x^{3} + a\right ) - 3 \, b x^{3} \log \left (x\right ) - a}{3 \, a^{2} x^{3}} \]
[In]
[Out]
Time = 0.16 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.89 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=- \frac {1}{3 a x^{3}} - \frac {b \log {\left (x \right )}}{a^{2}} + \frac {b \log {\left (\frac {a}{b} + x^{3} \right )}}{3 a^{2}} \]
[In]
[Out]
none
Time = 0.20 (sec) , antiderivative size = 33, normalized size of antiderivative = 0.94 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=\frac {b \log \left (b x^{3} + a\right )}{3 \, a^{2}} - \frac {b \log \left (x^{3}\right )}{3 \, a^{2}} - \frac {1}{3 \, a x^{3}} \]
[In]
[Out]
none
Time = 0.28 (sec) , antiderivative size = 42, normalized size of antiderivative = 1.20 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=\frac {b \log \left ({\left | b x^{3} + a \right |}\right )}{3 \, a^{2}} - \frac {b \log \left ({\left | x \right |}\right )}{a^{2}} + \frac {b x^{3} - a}{3 \, a^{2} x^{3}} \]
[In]
[Out]
Time = 5.45 (sec) , antiderivative size = 31, normalized size of antiderivative = 0.89 \[ \int \frac {1}{x^4 \left (a+b x^3\right )} \, dx=\frac {b\,\ln \left (b\,x^3+a\right )}{3\,a^2}-\frac {1}{3\,a\,x^3}-\frac {b\,\ln \left (x\right )}{a^2} \]
[In]
[Out]