What is the integral of-e^{1-x} ?

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

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integral of-e^{1-x}

\int - e^{1 - x} d x

e^{1 - x} + C

Solution steps

\int - e^{1 - x} d x

Take the constant out:

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

= - \int e^{1 - x} d x

Apply u-substitution

: \int - e^{u} d u

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

Take the constant out:

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

= - (- \int e^{u} d u)

Use the common integral:

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

= - (- e^{u})

Substitute back

u = 1 - x

= - (- e^{1 - x})

Simplify

= e^{1 - x}

Add a constant to the solution

= e^{1 - x} + C

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