Question

1. The explicit formula an = 2–5(n-1) represents an arithmetic sequence. Write the recursive

formula for the sequence.

Answer 1

Person above is right i just did the quick check too

The answer is D

Answer 2

`a_n=2,\:a_n=a_(n-1)-5`

Explanation:

If you map the sequence out, you get the following values:

a = 1, a(n) = 2

a = 2, a(n) = -3

a = 3, a(n) = -8

As you can see, the first term is 2 and the sequence is decreasing by 5 each time. Therefore, the answer is D.