Question

which of the following recurisive formula's represents the same geometric sequence as the formula an=2x3^(n-1)

Answer 1

{a1=2

{an =an-1 (1/2)

Explanation:

a1 = 2(1/2)0 = 2

a2 = 2(1/2)1 = 1 = a1(1/2)

a3 = 2(1/2)2 = 1/2 = a2(1/2).

an = an-1(1/2)

Answer 2

`a_(n)`=
`3` ·
`a_(n)` -1.