Flashlight -- I like that analogy... (n/t)

Posted by Subhotosh Khan on August 27, 2002 at 12:09:47:

In Reply to: Re: minimising posted by Soroban on August 27, 2002 at 02:18:04:

: :But how does it prove that the equation
: : y=(2000+20x+10x^1/2)/x cannot be minimised (i.e. the function does not have a convex). I thought we have to take the second derivative because for a convex to occur f"(x)>0.

: Please listen carefully, KK.

: The function had NO critical values.
: (We set the first derivative equal to 0
: and could not solve for x.)
: Therefore, there are NO maximums or minimums.

: Why do we take the second derivative?
: To test the Critical Values for max or min.
: But there are NO critical values to test.

: [Your flashlight doesn't work. I tell you that
: there are no batteries in it. And you insist on
: trying a battery-tester?]

Follow Ups:

• Re: minimising and maximising KK 01:52:43 08/28/02 (2)
  • What's your function - [y=(2000+20x+10x^1/2)/x ] or [y=(2000+20x+10x^1/2)] Subhotosh Khan 16:00:01 08/28/02 (0)
  • Look at Mr.G's post at the top of the thread... Subhotosh Khan 08:31:58 08/28/02 (0)
• Re: minimising and maximising KK 01:52:42 08/28/02 (0)

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