In optimisation, with the first order derivative equal to ___ and the second order derivative___ the function is at a maximum. May 5, 2021 by admin Question: In optimisation, with the first order derivative equal to ___ and the second order derivative___ the function is at a maximum. A. 0, 0 B. 0, < 0 C. 0, > 0 D. > 0, 0 Answer» b. 0, < 0 Note: The above multiple-choice question is for all general and Competitive Exams in India.