0
votes
4answers
50 views

Evaluating a summation

I am trying to solve a homework question in which a part involves the evaluation of a summation. The summation is: $$ \sum_{i=0}^n2^{2i+1} $$ and this is my attempt which i am stuck at. Any lead ...
3
votes
0answers
108 views

Perturbation problem

This is a mathematica exercise that I have to do, where $y(x) = x - \epsilon \sin(2y)$ and it wants me to express the solution $y$ of the equation as a power series in $ \epsilon$.