Question

A sequence is defined by the recursive function f(n + 1) = –10f(n).

If f(1) = 1, what is f(3)?

3
–30
100
–1,000

Answer 1

100

Explanation:

Answer 2

100

Explanation:

f(n+1) = -10f(n)

f(1) = 1

f(2) = -10f(1) => f(2) = -10·1 => f(2) = -10

f(3) = -10f(2) => f(3) = -10·(-10) => f(3) = 100