I had already posted this question, but there is no option comment on the answer which clearly incorrect and the person has read the question wrong.

Write an efficient algorithm to compute a^2^n where n is a positive number. Analyze the time complexity of your algorithm.

Please note the question reads a^(2^n) not a^(2*n). I want a detailed explanation of the answer, and why can we not comment of answers?

7. (04-09-2022) Write an efficient algorithm to compute a2n where n is a positive number. Analyze the time complexity of your algorithm