What is the integral from 1 to t of xe^{-x^2} ?

The integral from 1 to t of xe^{-x^2} is -1/2 (e^{-t^2}-1/e)

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integral from 1 to t of xe^{-x^2}

\int_{1}^{t} x e^{- x^{2}} d x

- \frac{1}{2} (e^{- t^{2}} - \frac{1}{e})

Solution steps

\int_{1}^{t} x e^{- x^{2}} d x

Apply u-substitution

: \int_{- 1}^{- t^{2}} - \frac{e ^{u}}{2} d u

= \int_{- 1}^{- t^{2}} - \frac{e ^{u}}{2} d u

Take the constant out:

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

= - \frac{1}{2} \cdot \int_{- 1}^{- t^{2}} e^{u} d u

Use the common integral:

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

= - \frac{1}{2} [e^{u}]_{- 1}^{- t^{2}}

Compute the boundaries:

e^{- t^{2}} - \frac{1}{e}

= - \frac{1}{2} (e^{- t^{2}} - \frac{1}{e})

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What is the integral from 1 to t of xe^{-x^2} ?
The integral from 1 to t of xe^{-x^2} is -1/2 (e^{-t^2}-1/e)