Question

If r = fxx(a,b), s = fx,(a,b),t = f,(a, b) then f(x,y) will have a maximum at
(a,b) if​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

$r = fxx(a,b) < 0$

Step-by-step explanation:

A function has a maximum at a point if the second differential at that point is less than 0.

Maxima can be found by equating the first differential to 0.

So the function will have a maximum at a,b . If r<0. The value of the maximum can be found by equating s=0.