3.12.51 \(\int (1+x)^m (1+2 x+x^2)^n \, dx\)

Optimal. Leaf size=26 \[ \frac {(x+1)^{m+1} \left (x^2+2 x+1\right )^n}{m+2 n+1} \]

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Rubi [A]  time = 0.01, antiderivative size = 26, normalized size of antiderivative = 1.00, number of steps used = 2, number of rules used = 2, integrand size = 16, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.125, Rules used = {644, 32} \begin {gather*} \frac {(x+1)^{m+1} \left (x^2+2 x+1\right )^n}{m+2 n+1} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(1 + x)^m*(1 + 2*x + x^2)^n,x]

[Out]

((1 + x)^(1 + m)*(1 + 2*x + x^2)^n)/(1 + m + 2*n)

Rule 32

Int[((a_.) + (b_.)*(x_))^(m_), x_Symbol] :> Simp[(a + b*x)^(m + 1)/(b*(m + 1)), x] /; FreeQ[{a, b, m}, x] && N
eQ[m, -1]

Rule 644

Int[((d_) + (e_.)*(x_))^(m_)*((a_) + (b_.)*(x_) + (c_.)*(x_)^2)^(p_), x_Symbol] :> Dist[(a + b*x + c*x^2)^p/(d
+ e*x)^(2*p), Int[(d + e*x)^(m + 2*p), x], x] /; FreeQ[{a, b, c, d, e, m, p}, x] && EqQ[b^2 - 4*a*c, 0] &&  !
IntegerQ[p] && EqQ[2*c*d - b*e, 0] &&  !IntegerQ[m]

Rubi steps

\begin {align*} \int (1+x)^m \left (1+2 x+x^2\right )^n \, dx &=\left ((1+x)^{-2 n} \left (1+2 x+x^2\right )^n\right ) \int (1+x)^{m+2 n} \, dx\\ &=\frac {(1+x)^{1+m} \left (1+2 x+x^2\right )^n}{1+m+2 n}\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 23, normalized size = 0.88 \begin {gather*} \frac {(x+1)^{m+1} \left ((x+1)^2\right )^n}{m+2 n+1} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(1 + x)^m*(1 + 2*x + x^2)^n,x]

[Out]

((1 + x)^(1 + m)*((1 + x)^2)^n)/(1 + m + 2*n)

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IntegrateAlgebraic [F]  time = 0.05, size = 0, normalized size = 0.00 \begin {gather*} \int (1+x)^m \left (1+2 x+x^2\right )^n \, dx \end {gather*}

Verification is not applicable to the result.

[In]

IntegrateAlgebraic[(1 + x)^m*(1 + 2*x + x^2)^n,x]

[Out]

Defer[IntegrateAlgebraic][(1 + x)^m*(1 + 2*x + x^2)^n, x]

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fricas [A]  time = 0.42, size = 24, normalized size = 0.92 \begin {gather*} \frac {{\left (x + 1\right )}^{m} {\left (x + 1\right )}^{2 \, n} {\left (x + 1\right )}}{m + 2 \, n + 1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((1+x)^m*(x^2+2*x+1)^n,x, algorithm="fricas")

[Out]

(x + 1)^m*(x + 1)^(2*n)*(x + 1)/(m + 2*n + 1)

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giac [A]  time = 0.17, size = 37, normalized size = 1.42 \begin {gather*} \frac {{\left (x + 1\right )}^{m} {\left (x + 1\right )}^{2 \, n} x + {\left (x + 1\right )}^{m} {\left (x + 1\right )}^{2 \, n}}{m + 2 \, n + 1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((1+x)^m*(x^2+2*x+1)^n,x, algorithm="giac")

[Out]

((x + 1)^m*(x + 1)^(2*n)*x + (x + 1)^m*(x + 1)^(2*n))/(m + 2*n + 1)

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maple [A]  time = 0.04, size = 27, normalized size = 1.04 \begin {gather*} \frac {\left (x +1\right )^{m +1} \left (x^{2}+2 x +1\right )^{n}}{m +2 n +1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x+1)^m*(x^2+2*x+1)^n,x)

[Out]

(x+1)^(m+1)*(x^2+2*x+1)^n/(m+2*n+1)

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maxima [A]  time = 1.35, size = 27, normalized size = 1.04 \begin {gather*} \frac {{\left (x + 1\right )} e^{\left (m \log \left (x + 1\right ) + 2 \, n \log \left (x + 1\right )\right )}}{m + 2 \, n + 1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((1+x)^m*(x^2+2*x+1)^n,x, algorithm="maxima")

[Out]

(x + 1)*e^(m*log(x + 1) + 2*n*log(x + 1))/(m + 2*n + 1)

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mupad [B]  time = 0.59, size = 26, normalized size = 1.00 \begin {gather*} \frac {{\left (x+1\right )}^{m+1}\,{\left (x^2+2\,x+1\right )}^n}{m+2\,n+1} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x + 1)^m*(2*x + x^2 + 1)^n,x)

[Out]

((x + 1)^(m + 1)*(2*x + x^2 + 1)^n)/(m + 2*n + 1)

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sympy [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \begin {cases} \frac {x \left (x + 1\right )^{m} \left (x^{2} + 2 x + 1\right )^{n}}{m + 2 n + 1} + \frac {\left (x + 1\right )^{m} \left (x^{2} + 2 x + 1\right )^{n}}{m + 2 n + 1} & \text {for}\: m \neq - 2 n - 1 \\\int \left (x + 1\right )^{- 2 n - 1} \left (\left (x + 1\right )^{2}\right )^{n}\, dx & \text {otherwise} \end {cases} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate((1+x)**m*(x**2+2*x+1)**n,x)

[Out]

Piecewise((x*(x + 1)**m*(x**2 + 2*x + 1)**n/(m + 2*n + 1) + (x + 1)**m*(x**2 + 2*x + 1)**n/(m + 2*n + 1), Ne(m
, -2*n - 1)), (Integral((x + 1)**(-2*n - 1)*((x + 1)**2)**n, x), True))

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