1. The problem statement, all variables and given/known data Find a formula for Σ(2i-1) = 1+3+5+...+(2n-1) Hint: What does the expression have to do with 1+2+3+...+2n? 2. Relevant equations 3. The attempt at a solution I have tried to solve this on my own for about a day now, and I am having trouble understanding the significance of the hint. I don't want an answer, just advice on how to connect the hint and the original expression.