1/2 ∫lim(0 to t) f(t)^2 dt= 1/x (∫lim(0 to x) f(t) dt)^2. then f(x) is

hey, after that ''equal to'' sign shouldn''t there b f(x) instead of f(t)?

no it is f(t) only. We have to first solve that integral and then put the limits