Question Number 25273 by Bhanu Mittal last updated on 07/Dec/17
$$\mathrm{If}\:\:{x},\:{y},\:{z}\:\mathrm{are}\:\mathrm{in}\:\mathrm{HP},\:\mathrm{then}\: \\ $$$$\mathrm{log}\:\left({x}+{z}\right)+\mathrm{log}\:\left({x}−\mathrm{2}{y}+{z}\right)\:\mathrm{is}\:\mathrm{equal}\:\mathrm{to} \\ $$