Question

Find the sum of the first 14 terms: 2 + 6 + 18 + 54 +

Answer 1

Explanation:

First term (a) = 2

Common ratio (r) = 6 /2 = 3

Now

sum of first 14 terms (S14)

`= \frac{a( {r}^(n) - 1) }{r \: - 1} \\ = \frac{2( {3}^(14) - 1) }{3 - 1} \\ = (4782968)/(2) \\ = 2391484`

Hope it will help :)❤

Answer 2

The pattern here is x3.
2+3+18+54+162+486+1458+4374+13122+39366+118098+354294+1062882+3188646=4782965