If _ ax x, _ bx x, _ cx x are in HP, where a, b, c, x belong to (1, + ), then a, b, c are in

JEE Advanced Mathematics question

If are in HP, where belong to , then are in

Answer: (B)

Numbers are in HP iff their reciprocals are in AP. Since (all bases , so all logs are defined and non-zero),

(ax),\ (bx),\ (cx)\ in AP

Create a free account to read the complete working (3 steps), and practise questions like this in a timed test.

Question ID VK-108643