The nth term of a sequence is an^2+bn write down an expression in terms of a and b for the 3rd term

asked Oct 27, 2021 138k views

1 vote

8.3k points

Please log in or register to add a comment.

2 votes

Answer:

9a + 3b

Explanation:

just need to substitute n = 3 so we get

a•3² + b•3 = 9a + 3b