What are the first four terms of the sequence an = 3n + 3n?

llm

Answered on Wed Mar 23 2022

Here, we have :

an = 3n + 3n

We have to find a1, a2, a3, a4.

So, putting n = 1, we get

a1 = 3(1) + 3(1)

a1 = 3 + 3

a1 = 6

now, n= 2

a2 = 3(2) + 3(2)

a2 = 6 + 6

a2 = 12

now, putting n = 3

a3 = 3(3) + 3(3)

a3 = 9 + 9

a3 =18

now, for n =4

a4 = 3(4) + 3(4)

a4 = 12 +12

a4 =24

Thus, first four terms of the sequence an = 3n + 3n are 6,12, 18, 24.