1. The problem statement, all variables and given/known data If our currency consists of a two-cent coin and three kinds of pennies, how many ways can we make change for a dollar? 2. Relevant equations 3. The attempt at a solution the previous part to this problem led to this generating function: G(x)=(1+x)^3∑_(k≥0)▒〖((k+3)¦3)(〖x^2)〗^k 〗 Am I supposed to put something in for x or for k? I don't know what to do. Any help would be great!!