Question

please help...explain in steps

Find the sum of the first 18 terms of the following sequence:

2, 6, 10 . . .

answers;
1296 144
256 648

Answer 1

its problem of AP

Answer 2

The sequence is adding 4 for every number after that.
We can find this because
10-6=4
6-2=4
So you just keep adding from there after 10 15 times.