Question

The second term of a sequence is 12 and the common ratio is 2. Which equation gives the nth term of the sequence?

Answer 1

The last:
`\bold{f(x) = 6(2)^(x-1)}`

Explanation:

Its a geometric sequence: aₙ = a₁ rⁿ⁻¹

f(x) = aₙ

a₁ = a₂÷r = 12÷2 = 6

r = 2

x = n

Therefore:

`f(x) = 6(2)^(x-1)`