"If `a_1,a_2,a_3, a_n` are in arithmetic progression with common difference `d ,` then evaluate the
Channel: Doubtnut
Date: 2020-07-05

"If `a_1,a_2,a_3, a_n` are in arithmetic progression with common difference `d ,` then evaluate the following   expression: `tan{tan^(-1)(d/(1+a_1a_2))+tan^(-1)(d/(1+a^2a_3))+tan^(-1)(d/(1+a_3a_4))++tan^(-1)(d/(1+a_(n-1)a_n))}`"