3.4.81 \(\int x (a+b \text {ArcSin}(c x^n)) \, dx\) [381]

Optimal. Leaf size=69 \[ \frac {1}{2} x^2 \left (a+b \text {ArcSin}\left (c x^n\right )\right )-\frac {b c n x^{2+n} \, _2F_1\left (\frac {1}{2},\frac {2+n}{2 n};\frac {1}{2} \left (3+\frac {2}{n}\right );c^2 x^{2 n}\right )}{2 (2+n)} \]

[Out]

1/2*x^2*(a+b*arcsin(c*x^n))-1/2*b*c*n*x^(2+n)*hypergeom([1/2, 1/2*(2+n)/n],[3/2+1/n],c^2*x^(2*n))/(2+n)

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Rubi [A]
time = 0.03, antiderivative size = 69, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 3, integrand size = 12, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.250, Rules used = {4926, 12, 371} \begin {gather*} \frac {1}{2} x^2 \left (a+b \text {ArcSin}\left (c x^n\right )\right )-\frac {b c n x^{n+2} \, _2F_1\left (\frac {1}{2},\frac {n+2}{2 n};\frac {1}{2} \left (3+\frac {2}{n}\right );c^2 x^{2 n}\right )}{2 (n+2)} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[x*(a + b*ArcSin[c*x^n]),x]

[Out]

(x^2*(a + b*ArcSin[c*x^n]))/2 - (b*c*n*x^(2 + n)*Hypergeometric2F1[1/2, (2 + n)/(2*n), (3 + 2/n)/2, c^2*x^(2*n
)])/(2*(2 + n))

Rule 12

Int[(a_)*(u_), x_Symbol] :> Dist[a, Int[u, x], x] /; FreeQ[a, x] &&  !MatchQ[u, (b_)*(v_) /; FreeQ[b, x]]

Rule 371

Int[((c_.)*(x_))^(m_.)*((a_) + (b_.)*(x_)^(n_))^(p_), x_Symbol] :> Simp[a^p*((c*x)^(m + 1)/(c*(m + 1)))*Hyperg
eometric2F1[-p, (m + 1)/n, (m + 1)/n + 1, (-b)*(x^n/a)], x] /; FreeQ[{a, b, c, m, n, p}, x] &&  !IGtQ[p, 0] &&
(ILtQ[p, 0] || GtQ[a, 0])

Rule 4926

Int[((a_.) + ArcSin[u_]*(b_.))*((c_.) + (d_.)*(x_))^(m_.), x_Symbol] :> Simp[(c + d*x)^(m + 1)*((a + b*ArcSin[
u])/(d*(m + 1))), x] - Dist[b/(d*(m + 1)), Int[SimplifyIntegrand[(c + d*x)^(m + 1)*(D[u, x]/Sqrt[1 - u^2]), x]
, x], x] /; FreeQ[{a, b, c, d, m}, x] && NeQ[m, -1] && InverseFunctionFreeQ[u, x] &&  !FunctionOfQ[(c + d*x)^(
m + 1), u, x] &&  !FunctionOfExponentialQ[u, x]

Rubi steps

\begin {align*} \int x \left (a+b \sin ^{-1}\left (c x^n\right )\right ) \, dx &=\frac {1}{2} x^2 \left (a+b \sin ^{-1}\left (c x^n\right )\right )-\frac {1}{2} b \int \frac {c n x^{1+n}}{\sqrt {1-c^2 x^{2 n}}} \, dx\\ &=\frac {1}{2} x^2 \left (a+b \sin ^{-1}\left (c x^n\right )\right )-\frac {1}{2} (b c n) \int \frac {x^{1+n}}{\sqrt {1-c^2 x^{2 n}}} \, dx\\ &=\frac {1}{2} x^2 \left (a+b \sin ^{-1}\left (c x^n\right )\right )-\frac {b c n x^{2+n} \, _2F_1\left (\frac {1}{2},\frac {2+n}{2 n};\frac {1}{2} \left (3+\frac {2}{n}\right );c^2 x^{2 n}\right )}{2 (2+n)}\\ \end {align*}

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Mathematica [A]
time = 0.04, size = 75, normalized size = 1.09 \begin {gather*} \frac {a x^2}{2}+\frac {1}{2} b x^2 \text {ArcSin}\left (c x^n\right )-\frac {b c n x^{2+n} \, _2F_1\left (\frac {1}{2},\frac {2+n}{2 n};1+\frac {2+n}{2 n};c^2 x^{2 n}\right )}{2 (2+n)} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[x*(a + b*ArcSin[c*x^n]),x]

[Out]

(a*x^2)/2 + (b*x^2*ArcSin[c*x^n])/2 - (b*c*n*x^(2 + n)*Hypergeometric2F1[1/2, (2 + n)/(2*n), 1 + (2 + n)/(2*n)
, c^2*x^(2*n)])/(2*(2 + n))

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Maple [F]
time = 0.00, size = 0, normalized size = 0.00 \[\int x \left (a +b \arcsin \left (c \,x^{n}\right )\right )\, dx\]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x*(a+b*arcsin(c*x^n)),x)

[Out]

int(x*(a+b*arcsin(c*x^n)),x)

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Maxima [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Failed to integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(a+b*arcsin(c*x^n)),x, algorithm="maxima")

[Out]

1/2*a*x^2 + 1/2*(x^2*arctan2(c*x^n, sqrt(c*x^n + 1)*sqrt(-c*x^n + 1)) + 2*c*n*integrate(1/2*sqrt(c*x^n + 1)*sq
rt(-c*x^n + 1)*x*x^n/(c^2*x^(2*n) - 1), x))*b

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Fricas [F(-2)]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {Exception raised: TypeError} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(a+b*arcsin(c*x^n)),x, algorithm="fricas")

[Out]

Exception raised: TypeError >>  Error detected within library code:   integrate: implementation incomplete (ha
s polynomial part)

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Sympy [C] Result contains complex when optimal does not.
time = 2.50, size = 60, normalized size = 0.87 \begin {gather*} \frac {a x^{2}}{2} + \frac {b x^{2} \operatorname {asin}{\left (c x^{n} \right )}}{2} + \frac {i b x^{2} \Gamma \left (\frac {1}{n}\right ) {{}_{2}F_{1}\left (\begin {matrix} \frac {1}{2}, - \frac {1}{n} \\ 1 - \frac {1}{n} \end {matrix}\middle | {\frac {x^{- 2 n}}{c^{2}}} \right )}}{4 \Gamma \left (1 + \frac {1}{n}\right )} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(a+b*asin(c*x**n)),x)

[Out]

a*x**2/2 + b*x**2*asin(c*x**n)/2 + I*b*x**2*gamma(1/n)*hyper((1/2, -1/n), (1 - 1/n,), 1/(c**2*x**(2*n)))/(4*ga
mma(1 + 1/n))

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Giac [F]
time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \text {could not integrate} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(a+b*arcsin(c*x^n)),x, algorithm="giac")

[Out]

integrate((b*arcsin(c*x^n) + a)*x, x)

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Mupad [F]
time = 0.00, size = -1, normalized size = -0.01 \begin {gather*} \int x\,\left (a+b\,\mathrm {asin}\left (c\,x^n\right )\right ) \,d x \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x*(a + b*asin(c*x^n)),x)

[Out]

int(x*(a + b*asin(c*x^n)), x)

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