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AP® Calculus AB-BC

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Moderate

Improper Integral of $e^{-2x}$

APCALC-RX8VK6

Evaluate the following integral:

$$\int _{ 0 }^{ \infty }{ { e }^{ -2x }dx } $$

A

$\cfrac{1}{2}$

B

$ \cfrac{-1}{2}$

C

$0$

D

$\infty $