mathxl.com on\'s MyLab & Mastering-52421 Summer-2018 MAT-155 MAT 155 OL 7e B03 S

Question

mathxl.com on's MyLab & Mastering-52421 Summer-2018 MAT-155 MAT 155 OL 7e B03 Su18 Test: F. E. Review Chap 1-5 20 of tr.... This Question: 1 pt or Consider the function fx)2x +4x-9. a. b. Determine, without graphing, whether the function has a minimum value or a maximum value. Find the minimum or maximum value and determine where it occurs. c. Identify the function's domain and its range. thav... a. The function has a maximum value b. The minimum/maximum value is-7.It occurs at x c. The domain of f is -0,0o). (Type your answer in interval notation.) The range of f is[ ?(Type your answer in interval notation.) your answer in each of the answer boxes

Explanation / Answer

f(x) = - 2x^2 + 4x - 9

a) the function has a maximum value as leading coefficient is negative

b) vertex is ( 1 , -7 )

the maximum value is - 7 and occurs at x = 1

c) the domain is ( - infinity , + infinity )

c) vertex is ( 1 , -7 )

so range is ( - infinity , - 7 ]

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