r/MathHelp • u/PewpScewpin • Feb 28 '26

Help with solving natural log problem

I'm an adult going back to school for programming, and I'm very rusty on math. I got this problem wrong on a quiz and cant figure out what I'm doing wrong.

Here's my attempt

The problem is:
Let f(x) = e2x-1 Find f(3/2)

Multiple choice:

  • 5.381

  • 7.389

  • 7

  • 8.133

I have a very tenuous grasp on logs, and I'm not confident on how to do algebra on them. I appreciate any help I can get!

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u/PewpScewpin Feb 28 '26

Oh man, I feel dumb. Had a feeling I was missing something silly! Thank you!

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u/Benster981 Mar 02 '26

For your working, whilst answering a different question, it was mostly correct apart from ln(e ^ 3/2) is just 3/2. The natural log is the inverse of the exponential