Given equation: $T_n = t_1 \cdot q^{n-1}$
The equation goes like this (some random values I put):
$$435 \cdot 2^{n-1}$$
How can you find the $n$ number if it's squared (or whatever you call this in english)? I have tried many ways, but no luck, it's not like finding a simple X variable.
Note, this is not homework, but for myself to understand.
If anyone can explain it, thanks!