Question

Given that the $a^{th}$, $b^{th}$ and $c^{th}$ term of an Arithmetic Progression are in Geometric Progression, then common ratio of that GP is?

• A. b-a
• B. a+b
• C.
• D. c-1

Answer 1

The correct option is C

Assume a GP, 1, 2, 4 with common ratio =2

Assume an AP with common difference 1 = 1, 2, 3, 4

Here $a^{th}$,$b^{th}$ and $c^{th}$ term is 1,2 and 4

Look in the answer options where you get answer 2 after substitution