So for this I have calculated what I believe to be the correct few terms of Q and P Q_{0}=75_{, }Q1=84, Q2=94.08. Always increasing by 12% of what the previous function was. I can't understand why my formula didn't work. I also tried using Q_{n}=Q_{0}*R^{n-1}but that provided an answer for n=0that was smaller than 75.

*Edit, I understand that I cant use n-1 because we're starting from n=0 and not n=1 so shouldn't it just be Q_{n}=Q_{0}*R^{n?}