3.27.91 \(\int \frac {x^{-1-\frac {n}{2}}}{\sqrt {a+b x^n}} \, dx\) [2691]

Optimal. Leaf size=26 \[ -\frac {2 x^{-n/2} \sqrt {a+b x^n}}{a n} \]

[Out]

-2*(a+b*x^n)^(1/2)/a/n/(x^(1/2*n))

________________________________________________________________________________________

Rubi [A]
time = 0.00, antiderivative size = 26, normalized size of antiderivative = 1.00, number of steps used = 1, number of rules used = 1, integrand size = 21, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.048, Rules used = {270} \begin {gather*} -\frac {2 x^{-n/2} \sqrt {a+b x^n}}{a n} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[x^(-1 - n/2)/Sqrt[a + b*x^n],x]

[Out]

(-2*Sqrt[a + b*x^n])/(a*n*x^(n/2))

Rule 270

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

Rubi steps

\begin {align*} \int \frac {x^{-1-\frac {n}{2}}}{\sqrt {a+b x^n}} \, dx &=-\frac {2 x^{-n/2} \sqrt {a+b x^n}}{a n}\\ \end {align*}

________________________________________________________________________________________

Mathematica [A]
time = 0.03, size = 26, normalized size = 1.00 \begin {gather*} -\frac {2 x^{-n/2} \sqrt {a+b x^n}}{a n} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[x^(-1 - n/2)/Sqrt[a + b*x^n],x]

[Out]

(-2*Sqrt[a + b*x^n])/(a*n*x^(n/2))

________________________________________________________________________________________

Maple [F]
time = 0.04, size = 0, normalized size = 0.00 \[\int \frac {x^{-1-\frac {n}{2}}}{\sqrt {a +b \,x^{n}}}\, dx\]

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x^(-1-1/2*n)/(a+b*x^n)^(1/2),x)

[Out]

int(x^(-1-1/2*n)/(a+b*x^n)^(1/2),x)

________________________________________________________________________________________

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^(-1-1/2*n)/(a+b*x^n)^(1/2),x, algorithm="maxima")

[Out]

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

________________________________________________________________________________________

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^(-1-1/2*n)/(a+b*x^n)^(1/2),x, algorithm="fricas")

[Out]

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

________________________________________________________________________________________

Sympy [A]
time = 19.66, size = 22, normalized size = 0.85 \begin {gather*} - \frac {2 \sqrt {b} \sqrt {\frac {a x^{- n}}{b} + 1}}{a n} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x**(-1-1/2*n)/(a+b*x**n)**(1/2),x)

[Out]

-2*sqrt(b)*sqrt(a/(b*x**n) + 1)/(a*n)

________________________________________________________________________________________

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^(-1-1/2*n)/(a+b*x^n)^(1/2),x, algorithm="giac")

[Out]

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

________________________________________________________________________________________

Mupad [B]
time = 1.31, size = 24, normalized size = 0.92 \begin {gather*} -\frac {2\,\sqrt {a+b\,x^n}}{a\,n\,x^{n/2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(1/(x^(n/2 + 1)*(a + b*x^n)^(1/2)),x)

[Out]

-(2*(a + b*x^n)^(1/2))/(a*n*x^(n/2))

________________________________________________________________________________________