Question

@agent0smith danno halp me

Answer 1

http://prntscr.com/ax9wpf what's the difference between these two formulas

Answer 2

They're the same

Answer 3

http://prntscr.com/ax9zga why can we only use the 1st one for this equation

Answer 4

Because you don't know a_n, you aren't given the number of viewers in 2008

Answer 5

oh okay thanks danno that makes sense because a_n is only in the second one

Answer 6

Yes, for the first you only need a_1 and r which you have.

Answer 7

thanks danno. you almost have to tutor soon rip ;'c