Question

http://prntscr.com/ae0ykl @imqwerty

Answer 1

tried this one? :)

Answer 2

Nope haven't attempted it but looking at it im gonna say it is either B or C?

Answer 3

I am getting a little mixed up on the equations from this lesson and the last lesson

Answer 4

Im leaning more on Option Cc though

Answer 5

the terms of a geometric sequence are of this from-

\(\large \color{orangered}{a_n=a_1r^{n-1}}\)

here \(a_n\) is representing the \(n^{th}\) term

you have this info-> \(f(n)=500\)
and -> \(g(n)= \large \left(\frac{9}{10}\right)^{n-1}\)

relate \(f(n)\) and \(g(n)\) with \(\color{orangered}{a_1}\) and \(\color{orangered}{r^{n-1}}\) and replace \(a_1\) and \(r^{n-1}\) in that \(a_n\) expression with the corresponding relative terms

the thing that you will get will be a GP

Answer 6

Ok I got it thank you :)

Answer 7

:) yw