Question

Write an equation for the nth term of the given arithmetic sequence. 7, 13, 19, 25

Answer 1

nth term = 6n + 1.

Explanation:

The first term a1 = 7 and the common difference d = 6.

nth term = a + d(n - 1)

= 7 + 6(n - 1)

= 6n + 1.

Answer 2

Hello,

U (n +1) = Un + 6

Un = Uo + nr

U9 = 7 + 9 × 6 = 7 + 54 = 61