Question

If f(x) has a global maximum at x=a, then which of the following MUST be true:

A) f(a) is a local minimum B) f'(a)=0 C) f''(a)<0 D) f''(a)>0 E) None of these

Answer 1

Well.

Answer 2

Which ones are obviously wrong?

Answer 3

B, C, and probably E.

Answer 4

Unfortunately, one of thos eis the correct answer.

Answer 5

if f(a) is the global maximum, then how can it possibly be a local minimum?

Answer 6

And, at a global maximum, the rate of change is always 0.

Answer 7

hint hint hint ack