Question

A computer is worth $2400 when it is new. After each year it is worth half what it was the previous year. What will its worth be after 4 years?

Answer 1

After `4` years the computer will worth `$150`

Explanation:

This is geometric progression sequence of which , first term

is `a=2400` , common ratio is `r=0.5` number of terms is

`n=5` We know term `:. t_n= a*r^(n-1)`

`:. t_5=2400*0.5^4=2400*1/2^4=2400/16= $150`

After `4` years the computer will worth `$150` [Ans]