Posted by **Lee** on Sunday, November 20, 2011 at 5:39am.

I'm having a had time with this problem. Could you please help with step by step resolution?

e^-x / e^-1 + 3 dx

Thank you..

- Pre-Calculus -
**drwls**, Sunday, November 20, 2011 at 6:41am
The "dx" at the end makes me think you are supposed to integrate

[e^-x / e^-1] + 3 .

But that would make it a calculus, not a precalculus, question.

It is not clear what the question is. In any case,

e^-x / e^-1 = e^(1-x)

The integral of

e^(1-x) + 3 dx is

-e^(1-x) + 3x + C

- Pre-Calculus -
**Lee**, Sunday, November 20, 2011 at 7:50am
Thank you. You helped greatly.

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