What is the integral of e^{-x^5}x^4 ?

The integral of e^{-x^5}x^4 is -1/5 e^{-x^5}+C

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integral of e^{-x^5}x^4

\int e^{- x^{5}} x^{4} d x

- \frac{1}{5} e^{- x^{5}} + C

Solution steps

\int e^{- x^{5}} x^{4} d x

Apply u-substitution

: \int - \frac{e ^{u}}{5} d u

= \int - \frac{e ^{u}}{5} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - \frac{1}{5} \cdot \int e^{u} d u

Use the common integral:

\int e^{u} d u = e^{u}

= - \frac{1}{5} e^{u}

Substitute back

u = - x^{5}

= - \frac{1}{5} e^{- x^{5}}

Add a constant to the solution

= - \frac{1}{5} e^{- x^{5}} + C

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What is the integral of e^{-x^5}x^4 ?
The integral of e^{-x^5}x^4 is -1/5 e^{-x^5}+C