I was not able to evaluate the following question: What is the sum of the first 20 terms of the geometric sequence $50(1.01)^n$.
If $\,x, xq, xq^2,...\,$ is a geometric sequence, then
In your case, $\,x=50(1.01)=50.5\,$ (in case you begin wiht $\,n=1\,$. If you begin with $\,n=0\,$ then $\,x=50\,$) , and $\,q=$...?
Now do the maths
HINT Try geometric series...