Question

Determine whether the
sequence is arithmetio.
an = 9n2+ 3
A) Arithmetic
B) Not arithmetic

Answer 1

Answer:

B.

Step-by-step explanation:

If n = 1 ,  a1 = 9^1^2 +3 = 12

a2 = 9*2^2 + 3 = 39

a3 = 9*3^2 + 3 = 84

The differences are 39 - 12 = 27 and 84 - 39 = 45   so it is not arithmetic as an arithmetic series ad a common difference.