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

The integral from 0 to-infinity of e^x is -1

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integral from 0 to-infinity of e^x

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

- 1

Solution steps

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

\int_{a}^{b} f (x) d x = - \int_{b}^{a} f (x) d x, a < b

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

\int_{- \infty}^{0} e^{x} d x = 1

= - 1

What is the integral from 0 to-infinity of e^x ?
The integral from 0 to-infinity of e^x is -1