\(\int \frac {x^m (c+d x)^3}{a+b x} \, dx\) [379]

Optimal result

Integrand size = 18, antiderivative size = 127 \[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\frac {d \left (3 b^2 c^2-3 a b c d+a^2 d^2\right ) x^{1+m}}{b^3 (1+m)}+\frac {d^2 (3 b c-a d) x^{2+m}}{b^2 (2+m)}+\frac {d^3 x^{3+m}}{b (3+m)}+\frac {(b c-a d)^3 x^{1+m} \operatorname {Hypergeometric2F1}\left (1,1,1-m,\frac {a}{a+b x}\right )}{b^3 m (a+b x)} \]

[Out]

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

Rubi [A] (verified)

Time = 0.08 (sec) , antiderivative size = 171, normalized size of antiderivative = 1.35, number of steps used = 7, number of rules used = 3, \(\frac {\text {number of rules}}{\text {integrand size}}\) = 0.167, Rules used = {90, 66, 45} \[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\frac {x^{m+1} (b c-a d)^3 \operatorname {Hypergeometric2F1}\left (1,m+1,m+2,-\frac {b x}{a}\right )}{a b^3 (m+1)}+\frac {d x^{m+1} (b c-a d)^2}{b^3 (m+1)}+\frac {d^2 x^{m+2} (b c-a d)}{b^2 (m+2)}+\frac {c d x^{m+1} (b c-a d)}{b^2 (m+1)}+\frac {c^2 d x^{m+1}}{b (m+1)}+\frac {2 c d^2 x^{m+2}}{b (m+2)}+\frac {d^3 x^{m+3}}{b (m+3)} \]

[In]

Int[(x^m*(c + d*x)^3)/(a + b*x),x]

[Out]

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

Rule 45

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 66

Int[((b_.)*(x_))^(m_)*((c_) + (d_.)*(x_))^(n_), x_Symbol] :> Simp[c^n*((b*x)^(m + 1)/(b*(m + 1)))*Hypergeometr
ic2F1[-n, m + 1, m + 2, (-d)*(x/c)], x] /; FreeQ[{b, c, d, m, n}, x] &&  !IntegerQ[m] && (IntegerQ[n] || (GtQ[
c, 0] &&  !(EqQ[n, -2^(-1)] && EqQ[c^2 - d^2, 0] && GtQ[-d/(b*c), 0])))

Rule 90

Int[((a_.) + (b_.)*(x_))^(m_.)*((c_.) + (d_.)*(x_))^(n_.)*((e_.) + (f_.)*(x_))^(p_.), x_Symbol] :> Int[ExpandI
ntegrand[(a + b*x)^m*(c + d*x)^n*(e + f*x)^p, x], x] /; FreeQ[{a, b, c, d, e, f, p}, x] && IntegersQ[m, n] &&
(IntegerQ[p] || (GtQ[m, 0] && GeQ[n, -1]))

Rubi steps \begin{align*} \text {integral}& = \int \left (\frac {d (b c-a d)^2 x^m}{b^3}+\frac {(b c-a d)^3 x^m}{b^3 (a+b x)}+\frac {d (b c-a d) x^m (c+d x)}{b^2}+\frac {d x^m (c+d x)^2}{b}\right ) \, dx \\ & = \frac {d (b c-a d)^2 x^{1+m}}{b^3 (1+m)}+\frac {d \int x^m (c+d x)^2 \, dx}{b}+\frac {(d (b c-a d)) \int x^m (c+d x) \, dx}{b^2}+\frac {(b c-a d)^3 \int \frac {x^m}{a+b x} \, dx}{b^3} \\ & = \frac {d (b c-a d)^2 x^{1+m}}{b^3 (1+m)}+\frac {(b c-a d)^3 x^{1+m} \, _2F_1\left (1,1+m;2+m;-\frac {b x}{a}\right )}{a b^3 (1+m)}+\frac {d \int \left (c^2 x^m+2 c d x^{1+m}+d^2 x^{2+m}\right ) \, dx}{b}+\frac {(d (b c-a d)) \int \left (c x^m+d x^{1+m}\right ) \, dx}{b^2} \\ & = \frac {c^2 d x^{1+m}}{b (1+m)}+\frac {c d (b c-a d) x^{1+m}}{b^2 (1+m)}+\frac {d (b c-a d)^2 x^{1+m}}{b^3 (1+m)}+\frac {2 c d^2 x^{2+m}}{b (2+m)}+\frac {d^2 (b c-a d) x^{2+m}}{b^2 (2+m)}+\frac {d^3 x^{3+m}}{b (3+m)}+\frac {(b c-a d)^3 x^{1+m} \, _2F_1\left (1,1+m;2+m;-\frac {b x}{a}\right )}{a b^3 (1+m)} \\ \end{align*}

Mathematica [A] (verified)

Time = 0.21 (sec) , antiderivative size = 118, normalized size of antiderivative = 0.93 \[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\frac {x^{1+m} \left (d \left (\frac {a^2 d^2}{1+m}+a b d \left (-\frac {3 c}{1+m}-\frac {d x}{2+m}\right )+b^2 \left (\frac {3 c^2}{1+m}+\frac {3 c d x}{2+m}+\frac {d^2 x^2}{3+m}\right )\right )+\frac {(b c-a d)^3 \operatorname {Hypergeometric2F1}\left (1,1+m,2+m,-\frac {b x}{a}\right )}{a (1+m)}\right )}{b^3} \]

[In]

Integrate[(x^m*(c + d*x)^3)/(a + b*x),x]

[Out]

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

Maple [F]

\[\int \frac {x^{m} \left (d x +c \right )^{3}}{b x +a}d x\]

[In]

int(x^m*(d*x+c)^3/(b*x+a),x)

[Out]

int(x^m*(d*x+c)^3/(b*x+a),x)

Fricas [F]

\[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\int { \frac {{\left (d x + c\right )}^{3} x^{m}}{b x + a} \,d x } \]

[In]

integrate(x^m*(d*x+c)^3/(b*x+a),x, algorithm="fricas")

[Out]

integral((d^3*x^3 + 3*c*d^2*x^2 + 3*c^2*d*x + c^3)*x^m/(b*x + a), x)

Sympy [C] (verification not implemented)

Result contains complex when optimal does not.

Time = 1.98 (sec) , antiderivative size = 292, normalized size of antiderivative = 2.30 \[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\frac {c^{3} m x^{m + 1} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 1\right ) \Gamma \left (m + 1\right )}{a \Gamma \left (m + 2\right )} + \frac {c^{3} x^{m + 1} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 1\right ) \Gamma \left (m + 1\right )}{a \Gamma \left (m + 2\right )} + \frac {3 c^{2} d m x^{m + 2} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 2\right ) \Gamma \left (m + 2\right )}{a \Gamma \left (m + 3\right )} + \frac {6 c^{2} d x^{m + 2} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 2\right ) \Gamma \left (m + 2\right )}{a \Gamma \left (m + 3\right )} + \frac {3 c d^{2} m x^{m + 3} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 3\right ) \Gamma \left (m + 3\right )}{a \Gamma \left (m + 4\right )} + \frac {9 c d^{2} x^{m + 3} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 3\right ) \Gamma \left (m + 3\right )}{a \Gamma \left (m + 4\right )} + \frac {d^{3} m x^{m + 4} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 4\right ) \Gamma \left (m + 4\right )}{a \Gamma \left (m + 5\right )} + \frac {4 d^{3} x^{m + 4} \Phi \left (\frac {b x e^{i \pi }}{a}, 1, m + 4\right ) \Gamma \left (m + 4\right )}{a \Gamma \left (m + 5\right )} \]

[In]

integrate(x**m*(d*x+c)**3/(b*x+a),x)

[Out]

c**3*m*x**(m + 1)*lerchphi(b*x*exp_polar(I*pi)/a, 1, m + 1)*gamma(m + 1)/(a*gamma(m + 2)) + c**3*x**(m + 1)*le
rchphi(b*x*exp_polar(I*pi)/a, 1, m + 1)*gamma(m + 1)/(a*gamma(m + 2)) + 3*c**2*d*m*x**(m + 2)*lerchphi(b*x*exp
_polar(I*pi)/a, 1, m + 2)*gamma(m + 2)/(a*gamma(m + 3)) + 6*c**2*d*x**(m + 2)*lerchphi(b*x*exp_polar(I*pi)/a,
1, m + 2)*gamma(m + 2)/(a*gamma(m + 3)) + 3*c*d**2*m*x**(m + 3)*lerchphi(b*x*exp_polar(I*pi)/a, 1, m + 3)*gamm
a(m + 3)/(a*gamma(m + 4)) + 9*c*d**2*x**(m + 3)*lerchphi(b*x*exp_polar(I*pi)/a, 1, m + 3)*gamma(m + 3)/(a*gamm
a(m + 4)) + d**3*m*x**(m + 4)*lerchphi(b*x*exp_polar(I*pi)/a, 1, m + 4)*gamma(m + 4)/(a*gamma(m + 5)) + 4*d**3
*x**(m + 4)*lerchphi(b*x*exp_polar(I*pi)/a, 1, m + 4)*gamma(m + 4)/(a*gamma(m + 5))

Maxima [F]

\[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\int { \frac {{\left (d x + c\right )}^{3} x^{m}}{b x + a} \,d x } \]

[In]

integrate(x^m*(d*x+c)^3/(b*x+a),x, algorithm="maxima")

[Out]

integrate((d*x + c)^3*x^m/(b*x + a), x)

Giac [F]

\[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\int { \frac {{\left (d x + c\right )}^{3} x^{m}}{b x + a} \,d x } \]

[In]

integrate(x^m*(d*x+c)^3/(b*x+a),x, algorithm="giac")

[Out]

integrate((d*x + c)^3*x^m/(b*x + a), x)

Mupad [F(-1)]

Timed out. \[ \int \frac {x^m (c+d x)^3}{a+b x} \, dx=\int \frac {x^m\,{\left (c+d\,x\right )}^3}{a+b\,x} \,d x \]

[In]

int((x^m*(c + d*x)^3)/(a + b*x),x)

[Out]

int((x^m*(c + d*x)^3)/(a + b*x), x)