Question

The explicit rule for a sequence is given.

an= 2/5 (5)^n−1

Answer 1

Explanation:

A geometric series is:

an = a₁ (r)^(n-1)

Here:

an = 2/5 (5)^(n-1)

So a₁ = 2/5, and r = 5. So an = 5an-1.

Your answer is correct, well done!