Question

A computer is worth $3200 when it is new. After each year it is worth half what it was the previous year. What will its worth be after 3 years?

Answer 1

Worth of the computer after 3 years `color(crimson)( a_3 = $4,000`

Explanation:

`a = $32,00, r = 1/2, n = 3`

To find `a_3`

`a_n = a r^(n-1)`

`a_3 = 32000 * (1/2)^3 = 32000 * (1/8) = color (crimson)($4,000`