3.3.2 \(\int \frac {x (c+d x^2)}{a+b x^2} \, dx\)

Optimal. Leaf size=35 \[ \frac {(b c-a d) \log \left (a+b x^2\right )}{2 b^2}+\frac {d x^2}{2 b} \]

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Rubi [A]  time = 0.03, antiderivative size = 35, normalized size of antiderivative = 1.00, number of steps used = 3, number of rules used = 2, integrand size = 18, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.111, Rules used = {444, 43} \begin {gather*} \frac {(b c-a d) \log \left (a+b x^2\right )}{2 b^2}+\frac {d x^2}{2 b} \end {gather*}

Antiderivative was successfully verified.

[In]

Int[(x*(c + d*x^2))/(a + b*x^2),x]

[Out]

(d*x^2)/(2*b) + ((b*c - a*d)*Log[a + b*x^2])/(2*b^2)

Rule 43

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.), x_Symbol] :> Int[ExpandIntegrand[(a + b*x)^m*(c + d
*x)^n, x], x] /; FreeQ[{a, b, c, d, n}, x] && NeQ[b*c - a*d, 0] && IGtQ[m, 0] && ( !IntegerQ[n] || (EqQ[c, 0]
&& LeQ[7*m + 4*n + 4, 0]) || LtQ[9*m + 5*(n + 1), 0] || GtQ[m + n + 2, 0])

Rule 444

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

Rubi steps

\begin {align*} \int \frac {x \left (c+d x^2\right )}{a+b x^2} \, dx &=\frac {1}{2} \operatorname {Subst}\left (\int \frac {c+d x}{a+b x} \, dx,x,x^2\right )\\ &=\frac {1}{2} \operatorname {Subst}\left (\int \left (\frac {d}{b}+\frac {b c-a d}{b (a+b x)}\right ) \, dx,x,x^2\right )\\ &=\frac {d x^2}{2 b}+\frac {(b c-a d) \log \left (a+b x^2\right )}{2 b^2}\\ \end {align*}

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Mathematica [A]  time = 0.01, size = 31, normalized size = 0.89 \begin {gather*} \frac {(b c-a d) \log \left (a+b x^2\right )+b d x^2}{2 b^2} \end {gather*}

Antiderivative was successfully verified.

[In]

Integrate[(x*(c + d*x^2))/(a + b*x^2),x]

[Out]

(b*d*x^2 + (b*c - a*d)*Log[a + b*x^2])/(2*b^2)

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IntegrateAlgebraic [F]  time = 0.00, size = 0, normalized size = 0.00 \begin {gather*} \int \frac {x \left (c+d x^2\right )}{a+b x^2} \, dx \end {gather*}

Verification is not applicable to the result.

[In]

IntegrateAlgebraic[(x*(c + d*x^2))/(a + b*x^2),x]

[Out]

IntegrateAlgebraic[(x*(c + d*x^2))/(a + b*x^2), x]

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fricas [A]  time = 0.76, size = 29, normalized size = 0.83 \begin {gather*} \frac {b d x^{2} + {\left (b c - a d\right )} \log \left (b x^{2} + a\right )}{2 \, b^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(d*x^2+c)/(b*x^2+a),x, algorithm="fricas")

[Out]

1/2*(b*d*x^2 + (b*c - a*d)*log(b*x^2 + a))/b^2

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giac [A]  time = 0.27, size = 32, normalized size = 0.91 \begin {gather*} \frac {d x^{2}}{2 \, b} + \frac {{\left (b c - a d\right )} \log \left ({\left | b x^{2} + a \right |}\right )}{2 \, b^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(d*x^2+c)/(b*x^2+a),x, algorithm="giac")

[Out]

1/2*d*x^2/b + 1/2*(b*c - a*d)*log(abs(b*x^2 + a))/b^2

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maple [A]  time = 0.00, size = 40, normalized size = 1.14 \begin {gather*} \frac {d \,x^{2}}{2 b}-\frac {a d \ln \left (b \,x^{2}+a \right )}{2 b^{2}}+\frac {c \ln \left (b \,x^{2}+a \right )}{2 b} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int(x*(d*x^2+c)/(b*x^2+a),x)

[Out]

1/2*d*x^2/b-1/2/b^2*ln(b*x^2+a)*a*d+1/2/b*c*ln(b*x^2+a)

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maxima [A]  time = 0.98, size = 31, normalized size = 0.89 \begin {gather*} \frac {d x^{2}}{2 \, b} + \frac {{\left (b c - a d\right )} \log \left (b x^{2} + a\right )}{2 \, b^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(d*x^2+c)/(b*x^2+a),x, algorithm="maxima")

[Out]

1/2*d*x^2/b + 1/2*(b*c - a*d)*log(b*x^2 + a)/b^2

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mupad [B]  time = 0.11, size = 31, normalized size = 0.89 \begin {gather*} \frac {d\,x^2}{2\,b}-\frac {\ln \left (b\,x^2+a\right )\,\left (a\,d-b\,c\right )}{2\,b^2} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

int((x*(c + d*x^2))/(a + b*x^2),x)

[Out]

(d*x^2)/(2*b) - (log(a + b*x^2)*(a*d - b*c))/(2*b^2)

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sympy [A]  time = 0.24, size = 27, normalized size = 0.77 \begin {gather*} \frac {d x^{2}}{2 b} - \frac {\left (a d - b c\right ) \log {\left (a + b x^{2} \right )}}{2 b^{2}} \end {gather*}

Verification of antiderivative is not currently implemented for this CAS.

[In]

integrate(x*(d*x**2+c)/(b*x**2+a),x)

[Out]

d*x**2/(2*b) - (a*d - b*c)*log(a + b*x**2)/(2*b**2)

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