Show that the converses of parts (a) and (b) of Theorem 6.2.8 are false by finding counterexamples. Theorem 6.2.8 Let f be differentiable on an interval I. Then, (a) If f'(x) > 0 for all x E I, then f is strictly increasing on I and (b) If f'(x) < 0 for all x E I, then fis strictly decreasing on I.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
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Chapter6: Vector Spaces
Section6.5: The Kernel And Range Of A Linear Transformation
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Show that the converses of parts (a) and (b) of Theorem 6.2.8 are false
by finding counterexamples.
Theorem 6.2.8
Let f be differentiable on an interval I. Then,
(a)
If f'(x) > 0 for all x E I, then f is strictly increasing on I
and
(b)
If f'(x) < 0 for all x E I, then fis strictly decreasing on I.
Transcribed Image Text:Show that the converses of parts (a) and (b) of Theorem 6.2.8 are false by finding counterexamples. Theorem 6.2.8 Let f be differentiable on an interval I. Then, (a) If f'(x) > 0 for all x E I, then f is strictly increasing on I and (b) If f'(x) < 0 for all x E I, then fis strictly decreasing on I.
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