If a, b, c, d are in GP, prove that `(b-c)^(2)+(c-a)^(2)+(d-b)^(2)=(a-d)^(2)`.
Channel: Doubtnut
Date: 2019-12-29

If a, b, c, d are in GP, prove that `(b-c)^(2)+(c-a)^(2)+(d-b)^(2)=(a-d)^(2)`.