Question

What is the common ratio when the sum of the first four terms in a GP is 30 and that of the last four terms is 960 and the first term is 2?​

Answer 1

Answer:

⇒ 1 + r + r² + r³ = 15.

(Given that Sum of last four terms is 960 and last term of GP is 512)

⇒ r = 2.

Therefore,

Common ratio is 2.

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