What is the integral of x^3sqrt(x^2+34) ?

The integral of x^3sqrt(x^2+34) is 1/5 (x^2+34)^{5/2}-34/3 (x^2+34)^{3/2}+C

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integral of x^3sqrt(x^2+34)

\int x^{3} x^{2} + 34 d x

\frac{1}{5} (x^{2} + 34)^{\frac{5}{2}} - \frac{34}{3} (x^{2} + 34)^{\frac{3}{2}} + C

Solution steps

\int x^{3} x^{2} + 34 d x

Apply u-substitution

: \int (u^{2} - 34) u^{2} d u

= \int (u^{2} - 34) u^{2} d u

Expand

(u^{2} - 34) u^{2} : u^{4} - 34 u^{2}

= \int u^{4} - 34 u^{2} d u

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int u^{4} d u - \int 34 u^{2} d u

\int u^{4} d u = \frac{u ^{5}}{5}

\int 34 u^{2} d u = \frac{34 u ^{3}}{3}

= \frac{u ^{5}}{5} - \frac{34 u ^{3}}{3}

Substitute back

u = x^{2} + 34

= \frac{( x ^{2} + 34 ) ^{5}}{5} - \frac{34 ( x ^{2} + 34 ) ^{3}}{3}

Simplify

\frac{( x ^{2} + 34 ) ^{5}}{5} - \frac{34 ( x ^{2} + 34 ) ^{3}}{3} : \frac{1}{5} (x^{2} + 34)^{\frac{5}{2}} - \frac{34}{3} (x^{2} + 34)^{\frac{3}{2}}

= \frac{1}{5} (x^{2} + 34)^{\frac{5}{2}} - \frac{34}{3} (x^{2} + 34)^{\frac{3}{2}}

Add a constant to the solution

= \frac{1}{5} (x^{2} + 34)^{\frac{5}{2}} - \frac{34}{3} (x^{2} + 34)^{\frac{3}{2}} + C

x \to 4 + lim (- \frac{3}{8 - 2 x})

x \to 0 lim (∣ x ∣ sin (x))

y = 5 tan (x), at x = \frac{π}{3}

\frac{d}{d x} (- \frac{1}{4 x})

ln (x - 1)

What is the integral of x^3sqrt(x^2+34) ?
The integral of x^3sqrt(x^2+34) is 1/5 (x^2+34)^{5/2}-34/3 (x^2+34)^{3/2}+C