# max/min

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• Jul 26th 2007, 06:55 AM
janvdl
Quote:

Originally Posted by Samantha
So there are no maximum nor minimum?

No there are maxima and minima, but only local ones.
• Jul 26th 2007, 06:57 AM
Samantha
what is it? =)
• Jul 26th 2007, 06:57 AM
janvdl
Quote:

Originally Posted by Samantha
what is it? =)

The points are (-1 ; 2) and (1 ; -2) :)
• Jul 26th 2007, 07:00 AM
curvature
Quote:

Originally Posted by janvdl
Would you mind explaining the other method of calculating maxima and minima to me?

We can also use second derivative test:
f'(a)=0 and f''(a)>0 (<0) imply f(a) is relative (or local) minimum (maximum).
• Jul 26th 2007, 07:03 AM
Samantha
I have 5 choices.

a) Relative maximum: x=0; Relative minimum x=squre root of5/3
b) Relative maximum: x=-1; Relative minimum x=1
c) Relative maxima: x=+-1; Relative minimum: x=0
d) Relative maximum: x = 0; Relative minima x = +-1
e) None of these

=(
• Jul 26th 2007, 07:06 AM
janvdl
Quote:

Originally Posted by Samantha
I have 5 choices.

a) Relative maximum: x=0; Relative minimum x=squre root of5/3
b) Relative maximum: x=-1; Relative minimum x=1
c) Relative maxima: x=+-1; Relative minimum: x=0
d) Relative maximum: x = 0; Relative minima x = +-1
e) None of these

=(

I'd say b)... ;)
• Jul 26th 2007, 07:08 AM
Samantha
So which 1? LOL
• Jul 26th 2007, 07:09 AM
janvdl
Quote:

Originally Posted by Samantha
So which 1? LOL

b)

Im sorry, i accidentally pressed the wrong key :(
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