A) At x=-1, y" is negative, concave downward, hence, y (-1) is a relative maximum value. B) At x=3, y" is positive, concave downward, hence, y (3) is a relative minimum value. At x = 3,y" is positive, concave upward, hence, y (3) is a relative maximum value. D At x = -1, y" is negative, concave downward, hence, y (-1) is a relative minimum value.

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Question 18
Using second derivative test for the critical points of the curve y = x³ 3x2 - 9x + 20, which of the following statements is true?
(A) At x=-1, y" is negative, concave downward, hence, y (-1) is a relative maximum value.
B) At x=3, y" is positive, concave downward, hence, y (3) is a relative minimum value.
C) Atx=3,y" is positive, concave upward, hence, y (3) is a relative maximum value.
D) At x = -1, y" is negative, concave downward, hence, y (-1) is a relative minimum value.
Transcribed Image Text:Question 18 Using second derivative test for the critical points of the curve y = x³ 3x2 - 9x + 20, which of the following statements is true? (A) At x=-1, y" is negative, concave downward, hence, y (-1) is a relative maximum value. B) At x=3, y" is positive, concave downward, hence, y (3) is a relative minimum value. C) Atx=3,y" is positive, concave upward, hence, y (3) is a relative maximum value. D) At x = -1, y" is negative, concave downward, hence, y (-1) is a relative minimum value.
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