Graphing Polynomials - Cool math Algebra Help Lessons - Absolute Extrema ( Maximums and Minimums )

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Coolmath Algebra
Graphing Polynomials Lesson 11 - Absolute Maximums and Minimums (Extrema) (page 2 of 2)
---- This algebra lesson explains how to find the absolute maximums and minimums (extrema) of a polynomial.

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Check out the graph of this guy:

graph of f ( x ) = ( x - 2 )^2 on [ 1 , 4 ) ... the point ( 1 , 1 ) is nothing, the point ( 2 , 0 ) is an absolute and relative min, and the point ( 4 , 4 ) is nothing

f has an absolute and relative min of 0 at x = 2.

So... why is that (4, 4) point nothing? Why isn't there an absolute max there? Well, y = 4 isn't included, so, what would the max be?

3.9?

3.99?

3.999999?

See the problem?

Open endpoints can't be absolute extrema.

YOUR TURN:

Find the relative and absolute extrema of:

(Yes, you need to graph it!)

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