Optimal. Leaf size=39 \[ -\frac {a (a+b x)^{1+n}}{b^2 (1+n)}+\frac {(a+b x)^{2+n}}{b^2 (2+n)} \]
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Rubi [A]
time = 0.01, antiderivative size = 39, normalized size of antiderivative = 1.00, number of steps
used = 2, number of rules used = 1, integrand size = 9, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {45}
\begin {gather*} \frac {(a+b x)^{n+2}}{b^2 (n+2)}-\frac {a (a+b x)^{n+1}}{b^2 (n+1)} \end {gather*}
Antiderivative was successfully verified.
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Rule 45
Rubi steps
\begin {align*} \int x (a+b x)^n \, dx &=\int \left (-\frac {a (a+b x)^n}{b}+\frac {(a+b x)^{1+n}}{b}\right ) \, dx\\ &=-\frac {a (a+b x)^{1+n}}{b^2 (1+n)}+\frac {(a+b x)^{2+n}}{b^2 (2+n)}\\ \end {align*}
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Mathematica [A]
time = 0.03, size = 33, normalized size = 0.85 \begin {gather*} \frac {(a+b x)^{1+n} (-a+b (1+n) x)}{b^2 (1+n) (2+n)} \end {gather*}
Antiderivative was successfully verified.
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Maple [A]
time = 0.12, size = 36, normalized size = 0.92
method | result | size |
gosper | \(-\frac {\left (b x +a \right )^{1+n} \left (-x n b -b x +a \right )}{b^{2} \left (n^{2}+3 n +2\right )}\) | \(36\) |
risch | \(-\frac {\left (-b^{2} n \,x^{2}-a b n x -x^{2} b^{2}+a^{2}\right ) \left (b x +a \right )^{n}}{b^{2} \left (2+n \right ) \left (1+n \right )}\) | \(50\) |
norman | \(\frac {x^{2} {\mathrm e}^{n \ln \left (b x +a \right )}}{2+n}+\frac {n a x \,{\mathrm e}^{n \ln \left (b x +a \right )}}{b \left (n^{2}+3 n +2\right )}-\frac {a^{2} {\mathrm e}^{n \ln \left (b x +a \right )}}{b^{2} \left (n^{2}+3 n +2\right )}\) | \(73\) |
Verification of antiderivative is not currently implemented for this CAS.
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Maxima [A]
time = 0.27, size = 42, normalized size = 1.08 \begin {gather*} \frac {{\left (b^{2} {\left (n + 1\right )} x^{2} + a b n x - a^{2}\right )} {\left (b x + a\right )}^{n}}{{\left (n^{2} + 3 \, n + 2\right )} b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Fricas [A]
time = 1.21, size = 53, normalized size = 1.36 \begin {gather*} \frac {{\left (a b n x + {\left (b^{2} n + b^{2}\right )} x^{2} - a^{2}\right )} {\left (b x + a\right )}^{n}}{b^{2} n^{2} + 3 \, b^{2} n + 2 \, b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Sympy [B] Leaf count of result is larger than twice the leaf count of optimal. 201 vs.
\(2 (31) = 62\).
time = 0.22, size = 201, normalized size = 5.15 \begin {gather*} \begin {cases} \frac {a^{n} x^{2}}{2} & \text {for}\: b = 0 \\\frac {a \log {\left (\frac {a}{b} + x \right )}}{a b^{2} + b^{3} x} + \frac {a}{a b^{2} + b^{3} x} + \frac {b x \log {\left (\frac {a}{b} + x \right )}}{a b^{2} + b^{3} x} & \text {for}\: n = -2 \\- \frac {a \log {\left (\frac {a}{b} + x \right )}}{b^{2}} + \frac {x}{b} & \text {for}\: n = -1 \\- \frac {a^{2} \left (a + b x\right )^{n}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} + \frac {a b n x \left (a + b x\right )^{n}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} + \frac {b^{2} n x^{2} \left (a + b x\right )^{n}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} + \frac {b^{2} x^{2} \left (a + b x\right )^{n}}{b^{2} n^{2} + 3 b^{2} n + 2 b^{2}} & \text {otherwise} \end {cases} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Giac [A]
time = 1.03, size = 76, normalized size = 1.95 \begin {gather*} \frac {{\left (b x + a\right )}^{n} b^{2} n x^{2} + {\left (b x + a\right )}^{n} a b n x + {\left (b x + a\right )}^{n} b^{2} x^{2} - {\left (b x + a\right )}^{n} a^{2}}{b^{2} n^{2} + 3 \, b^{2} n + 2 \, b^{2}} \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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Mupad [B]
time = 0.38, size = 94, normalized size = 2.41 \begin {gather*} \left \{\begin {array}{cl} -\frac {a\,\ln \left (a+b\,x\right )-b\,x}{b^2} & \text {\ if\ \ }n=-1\\ \frac {\ln \left (a+b\,x\right )+\frac {a}{a+b\,x}}{b^2} & \text {\ if\ \ }n=-2\\ \frac {2\,\left (\frac {{\left (a+b\,x\right )}^{n+2}}{2\,n+4}-\frac {a\,{\left (a+b\,x\right )}^{n+1}}{2\,n+2}\right )}{b^2} & \text {\ if\ \ }n\neq -1\wedge n\neq -2 \end {array}\right . \end {gather*}
Verification of antiderivative is not currently implemented for this CAS.
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