Question

Give a formula for the number of dots in the nth figure inthis sequence,2n + 11/2n(n-1)4n-34(n-1)

Answer 1

pretty67, this is the solution:

We have the following sequence:

1, 5, 9, 13

d = 4 (Common difference)

Therefore,

An = 4 (n - 1) + 1

An = 4n - 4 + 1

An = 4n -3

The correct answer is C.