If fxxfyy < (fxy)2 when fxx and fyy are of the same sign, then the function is at

by
Question:

If fxxfyy < (fxy)2 when fxx and fyy are of the same sign, then the function is at

A.

minimum point

B.

maximum point

C.

inflexion point

D.

saddle point

Answer» b. maximum point

Note: The above multiple-choice question is for all general and Competitive Exams in India.