Question

Given a term in an arithmetic sequence and the common difference, find the first five terms

1) a17 = 71, d = 6

I need the answer fast and if you can, please explain.

Answer 1

Explanation:

To find the first five terms

we come with a1

a(n) = a1 +(n-1)d

a(17) = a1 +(17-1)6=71

So a1=71-96= -25

first five terms:

a1= -25

a(2) = -25 +(2-1)6=-19

a(3) = -25 +(3-1)6=-13

a(4) = -25 +(4-1)6=-7

a(5) = -25 +(5-1)6=-1

hope it helps