What is the integral from 0 to infinity of e^{-x-y} ?

The integral from 0 to infinity of e^{-x-y} is e^{-y}

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integral from 0 to infinity of e^{-x-y}

\int_{0}^{\infty} e^{- x - y} d x

e^{- y}

Solution steps

\int_{0}^{\infty} e^{- x - y} d x

Compute the indefinite integral:

\int e^{- x - y} d x = - e^{- y - x} + C

Compute the boundaries:

\int_{0}^{\infty} e^{- x - y} d x = 0 - (- e^{- y})

= 0 - (- e^{- y})

Simplify

= e^{- y}

\int \frac{tan ( x )}{x} d x

\int e^{3 x} (2 x^{2} + 1) d x

x^{2} - 4

\int r e^{- r^{2}} d r

n = 1 \sum \infty \frac{1}{( 2 n - 1 ) ^{2}}

What is the integral from 0 to infinity of e^{-x-y} ?
The integral from 0 to infinity of e^{-x-y} is e^{-y}