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Find the sum of first 5 terms of a geometric progression whose first term is 6 and common multiple is 2.

Find the sum of first 5 terms of a geometric progression whose first term is 6 and common multiple is 2. Correct Answer 186

Given:

Geometric progression whose first term is 6 and common multiple is 2.

Formula used:

Sum of first ‘n’ terms of geometric progression (G.P.), Sn = a / , where r > 1,

a = first term, r = common multiple

Calculation:

a = 6, r = 2

⇒ Sum of first 5 terms = 6 × × 1/

⇒ 6 × × 1

⇒ 186

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