See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Diff. both sides        y x 1 1 f xy y xy' y' f t dt y f x f t dt x f y y'        Put x 1      y 1 f y y y ' 3y f t dt y 'f y        y 1 y f 3y f t dt     x 1 x f x 3x f t dx   Diff.    f x x f ' x 3 f x      3 f ' x x    f x 3 nx c f 1 3 c         f x 3 nx 3 f e 6     