Find the sum of the first five terms of the G.P 2,6, 18 ….
- A.
484 - B.
243 - C.
242 - D.
130 - E.
121
Correct Answer: Option C
Explanation
(S_{n} = frac{a(r^n – 1)}{r – 1})
a = 2; r = 6/2 = 3.
(S_{5} = frac{2(3^5 – 1)}{3 – 1})
= (243 – 1 = 242)
Find the sum of the first five terms of the G.P 2,6, 18 ….
(S_{n} = frac{a(r^n – 1)}{r – 1})
a = 2; r = 6/2 = 3.
(S_{5} = frac{2(3^5 – 1)}{3 – 1})
= (243 – 1 = 242)