Still have math questions?

Ask our expert tutors
Algebra
Question

Alex started a new social media account, which he ...

Alex started a new social media account, which he uses to post pictures of cute animals. On the first day, he had only \( 8 \) followers. However, his account became popular very quickly and his number of followers tripled every day. Identify the recursive function that gives the number of followers he has after \( n \) days. 

A) \( f ( n ) = \left\{ \begin{array} { l } { f ( 1 ) = 3 } \\ { f ( n ) = 8 f ( n - 1 ) if  n > 1 } \end{array} \right.\)

B) \( f ( n ) = \left\{ \begin{array} { l } { f ( 1 ) = 8 } \\ { f ( n ) = f ( n - 1 ) + 3  if n > 1 } \end{array} \right.\) 

C) \(f ( n ) = \left\{ \begin{array} { l } { f ( 1 ) = 3 } \\ { f ( n ) = f ( n - 1 ) + 8  if n > 1 } \end{array} \right.\)

D) \(f ( n ) = \left\{ \begin{array} { l } { f ( 1 ) = 8 } \\ { f ( n ) = 3 f ( n - 1 ) if  n > 1 } \end{array} \right.\) 

 

Answer

D

Solution
View full explanation on CameraMath App.