Is the following a Geometric Sequence n 4 4n1 n 5 2nSolu

Is the following a Geometric Sequence?:

_n = 4 • 4^n-1

_n = 5 + 2n

Solution

1) put n = 1, 2, 3 ....

a_n = 16, 8, 16/3, 4, ,,,,,,,,,,

it is Geometric squence.

2) put n = 1, 2, 3 ....

a_n = 7, 9, 11, 13, ,,,,,,,,,,

it is Arithmatic squence.