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Calculus (MindTap Course List)

8th Edition
James Stewart
ISBN: 9781285740621

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Calculus (MindTap Course List)

8th Edition
James Stewart
ISBN: 9781285740621
Textbook Problem

Sketch the graph of f by hand and use your sketch to find the absolute and local maximum and minimum values of f. (Use the graphs and transformations of Sections 1.2 and 1.3.)

f ( x ) = | x |

To determine

To sketch:

The graph of a function f by hand and then find the absolute and local maximum and minimum values of f.

Explanation

1) Concept:

Sketch the graph of f, and then use definitions of absolute and local maximum and minimum values of f.

2) Definitions:

i) Let c be a number in the domain D of a function f. Then f(c) is the absolute maximum value of f on D if fc f(x) for all x in D and absolute minimum value of f on D if fcf(x) for all x in D.

ii) The number f(c) is a local maximum value of f  if fcf(x) when x is near c.

 local minimum value of f if fc fx  when x is near c.

3) Given:

fx=|x|

4) Calculation:

Sketch the graph of f(x):

From the above graph, the function has absolute minimum value f0=0 since it is the lowest point on the domain of the given function but f'0 does not exist

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