1. f(x) = 2(x + 1)2 + 3 a) What is the sign of the leading coefficient? b) Does the parabola open upward or downward? c) What is the vertex of the parabola? d) Find the intervals for which f is increasing: Find the intervals for which f is decreasing:

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section: Chapter Questions
Problem 17RE
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Question
1. f(x) = 2(x + 1)2 + 3
a) What is the sign of the leading coefficient?
b) Does the parabola open upward or downward?
c) What is the vertex of the parabola?
d) Find the intervals for which f is increasing:
Find the intervals for which f is decreasing:
Transcribed Image Text:1. f(x) = 2(x + 1)2 + 3 a) What is the sign of the leading coefficient? b) Does the parabola open upward or downward? c) What is the vertex of the parabola? d) Find the intervals for which f is increasing: Find the intervals for which f is decreasing:
Expert Solution
Step 1

The leading coefficient is = 2

It is a positive number

Answer(a): Positive

Step 2

b) Since the leading coefficient is positive so it opens upwards. 

c)

Compare these two equations

Algebra homework question answer, step 2, image 1

So, a=2 , h=-1 , k= 3

So, vertex= (h,k)= (-1,3)

Answer(c): (-1,3)

 

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