How do you prove these?(adsbygoogle = window.adsbygoogle || []).push({});

Let 0 < a, an element of R, and x, y an element of R. Then:

(a^x)(a^y) = (a^(x+y))

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

Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Simple Proofs

**Physics Forums | Science Articles, Homework Help, Discussion**