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Scholar
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Date Posted: 7/2/2008 5:24:51 AM  Status: Closed
Help neede( I will rate Lifesaver)
Course Textbook Chapter Problem
Calculus N/A N/A N/A
Question Details:
Is this statement ture or false explain why.

If  f (x, y) has exactly two critical points, they can't both be local maxima.
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Oracle
Karma Points: 33,642
(ANDHRA UNIVERSITY COLLEGE OF ENGINEERING)
Date Posted: 7/2/2008 8:27:41 AM  Status: Live
Asker's Rating: Lifesaver   
Response:
Question:
Is this statement ture or false explain why.

If  f (x, y) has exactly two critical points, they can't both be local maxima.
ONE IMPORTANT POINT IS MISSING
IS THE FUNCTION CONTINUOUS BETWEEN THOSE 2 CRITICAL POINTS.
CASE 1
CONTINUOUS ...SEE SKETCH BELOW [FOR CONVENIENCE DRAWING X-Y DIAGRAM

K AND M ARE  2 CRITICAL POINTS REPRESENTING 2 LOCAL MAXIMAS.
THERE HAS TO BE ONE LOCAL MINIMA BETWEEN THEM IF THE FUNCTION IS CONTINUOUS
HENCE GIVEN STATEMENT IS TRUE.
CASE 2
FUNCTION IS DISCONTINUOUS BETWEEN THE 2 CRITICAL POINTS
SEE SKETCH BELOW


K AND M ARE  2 CRITICAL POINTS REPRESENTING 2 LOCAL MAXIMAS.
THERE NEED NOT BE ONE LOCAL MINIMA BETWEEN THEM IF THE FUNCTION IS DISCONTINUOUS
HENCE GIVEN STATEMENT IS NOT TRUE IN THIS CASE


john l.'s Comment:
Thank you so much for your help!!





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