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Let f(x) = -x4-9x³+2x+8. Find the open intervals on which is concave up (down). Then determine the -coordinates of all inflection points of 1. 2. 3. is concave up on the intervals = is concave down on the intervals The inflection points occur at = Notes: Do not enter ANY spaces! Use inf for and -inf forco. In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none". In the last one, your answer should be a comma separated list of values or the word "none".

Let f(x) = -x4-9x³+2x+8. Find the open intervals on which is concave up (down). Then determine the -coordinates of all inflection points of 1. 2. 3. is concave up on the intervals = is concave down on the intervals The inflection points occur at = Notes: Do not enter ANY spaces! Use inf for and -inf forco. In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none". In the last one, your answer should be a comma separated list of values or the word "none".

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.4: Definition Of Function
Problem 51E
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Let f(x) = -x4-9x³+2x+8 . Find the open intervals on which is concave up (down). Then determine the -coordinates of all inflection points of 1. 2. 3. is concave up on the intervals is concave down on the intervals The inflection points occur at Notes: Do not enter ANY spaces! Use inf for and -inf for - ∞ . In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none". In the last one, your answer should be a comma separated list of values or the word "none".
Transcribed Image Text:Let f(x) = -x4-9x³+2x+8 . Find the open intervals on which is concave up (down). Then determine the -coordinates of all inflection points of 1. 2. 3. is concave up on the intervals is concave down on the intervals The inflection points occur at Notes: Do not enter ANY spaces! Use inf for and -inf for - ∞ . In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none". In the last one, your answer should be a comma separated list of values or the word "none".
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