[tex]f(x) = \sum_{n=0}^\infty \frac{cos(4^nx)}{3^n}[/tex](adsbygoogle = window.adsbygoogle || []).push({});

Usually the period T is worked out by doing [tex]\frac{2\pi}{w}=\frac{T}{n}[/tex] where w is the angular frequency and T is the period. n is the function number in the series. But it obviously can't be applied here.

**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: What is the period of this function?

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