What is the integral of 10e^{-st} ?

The integral of 10e^{-st} is -e^{-st}(10)/s+C

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integral of 10e^{-st}

\int 10 e^{- s t} d t

- e^{- s t} \frac{10}{s} + C

Solution steps

\int 10 e^{- s t} d t

Take the constant out:

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

= 10 \cdot \int e^{- s t} d t

Apply u-substitution

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

= 10 \cdot \int - \frac{e ^{u}}{s} d u

Take the constant out:

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

= 10 (- \frac{1}{s} \cdot \int e^{u} d u)

Use the common integral:

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

= 10 (- \frac{1}{s} e^{u})

Substitute back

u = - s t

= 10 (- \frac{1}{s} e^{- s t})

Simplify

10 (- \frac{1}{s} e^{- s t}) : - e^{- s t} \frac{10}{s}

= - e^{- s t} \frac{10}{s}

Add a constant to the solution

= - e^{- s t} \frac{10}{s} + C

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What is the integral of 10e^{-st} ?
The integral of 10e^{-st} is -e^{-st}(10)/s+C