Math Chapter Wise Limit, Continuity And Differentiability Of Function Of One Variable English MCQ UKPSC Lecturer (Mains) 2020 Q.Let f(x+ y) = f(x) f(y) for all real values of x and y. If f(5) = 2, f'(0) = 3 then f'(5) = A1 B3 C6 D9 Show answer Correct answer: 6