164k views
14 votes
Write your own explicit formula. List the first 4 terms and solve for the 10th term using the formula. HELP ME!!!!

User Jronny
by
4.5k points

1 Answer

1 vote

Explanation:

Step 1: Determine an explicit formula


a(n)=5+2(n-2)

List the first 4 terms


a(1) = 5 + 2(1 - 2) = 5 - 2 = 3


a(2) = 5 + 2(2 - 2) = 5 + 0 = 5


a(3) = 5 + 2(3 - 2) = 5 + 2 = 7


a(4) = 5 + 2(4 - 2) = 5 + 4 = 7

Solve for the 10th term


a(10) = 5 + 2(10 - 2) = 5 + 16 = 21

Hope this helps!