Show that the products of the corresponding terms of the sequences a, ar, ar2,…arn – 1 and A, AR, AR2, … ARn – 1 form a G.P, and find the common ratio.
Given: The sequences a, ar, ar2,…arn – 1 and A, AR, AR2, … ARn – 1
The products of the corresponding terms of the G.P is
a × A, ar × AR, ar2 × AR2, ……….., arn × ARn
Here,
= rR
= rR
∴ The product of the corresponding terms of the given sequence forms a G.P and the common ratio is rR