/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 19 In Problems 19 through 21 (a) ... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

In Problems 19 through 21 (a) find the value of the function at \(x=0, x=1\), and \(x=-1\). (b) find all \(x\) such that the value of the function is \((i) 0,(i i) 1\), and \((i i i)-1 .\) $$ f(x)=\frac{3 x+5}{2} $$

Short Answer

Expert verified
For x=0 the function value is 2.5, for x=1 it's 4, and for x=-1 it's 1. The function reaches the value 0 when x=-5/3, it reaches 1 when x=-3/2, and it reaches -1 when x=-9/2.

Step by step solution

01

Evaluate the function at specified points

Substitute the given x-values (0, 1, -1) into the function \(f(x)=\frac{3x+5}{2}\) to find the function values.
02

Calculate function values

For \(x=0\), \(f(0)=\frac{3(0)+5}{2}=\frac{5}{2}\). For \(x=1\), \(f(1)=\frac{3(1)+5}{2}=\frac{8}{2}=4\). For \(x=-1\), \(f(-1)=\frac{3(-1)+5}{2}=\frac{2}{2}=1\).
03

Determine x-values for given function values

To find the x-values for which \(f(x)=0\), \(f(x)=1\), and \(f(x)=-1\), set the function equal to each of these values and solve for x respectively.
04

Solve the equations

For \(f(x)=0\), \(0=\frac{3x+5}{2}\), we get \(x=-\frac{5}{3}\). For \(f(x)=1\), \(1=\frac{3x+5}{2}\), we get \(x=-\frac{3}{2}\). For \(f(x)=-1\), \(-1=\frac{3x+5}{2}\), we get \(x=-\frac{9}{2}\).

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Function Evaluation
Function evaluation is a process where we find the value of a function for specific values of its variable, in this case, the variable is \(x\). In the given problem, the function is \(f(x) = \frac{3x + 5}{2}\). By substituting values \(x = 0\), \(x = 1\), and \(x = -1\) into the function, we can calculate the corresponding outputs.
  • For \(x = 0\), substitute 0 into the equation: \(f(0) = \frac{3(0) + 5}{2} = \frac{5}{2}\).
  • For \(x = 1\), substitute 1: \(f(1) = \frac{3(1) + 5}{2} = \frac{8}{2} = 4\).
  • For \(x = -1\), substitute -1: \(f(-1) = \frac{3(-1) + 5}{2} = \frac{2}{2} = 1\).

Function evaluation helps us understand how the function behaves at different points. It is fundamental in analyzing functions and predicting outcomes.
Linear Functions
Linear functions are mathematical functions that create a straight line when graphed. They can be written in the form \(y = mx + b\), where \(m\) is the slope and \(b\) is the y-intercept. The function in this problem \(f(x) = \frac{3x + 5}{2}\) is indeed a linear function.

Let's simplify it to see its linear form more clearly. We can rewrite the function as:
\[ f(x) = \frac{3}{2}x + \frac{5}{2} \]
Here, \(\frac{3}{2}\) is the slope and \(\frac{5}{2}\) is the y-intercept. This slope tells us how steep the line is and in which direction it moves. In our function, a positive slope means the line rises as \(x\) increases. Linear functions are very common in mathematical modeling due to their straightforwardness.
Solving Equations
Solving equations involves finding the values of the variable that make the equation true. In this exercise, we solve for \(x\) when \(f(x)\) is equal to given values: 0, 1, and -1.
  • For \(f(x) = 0\): Write \(0 = \frac{3x + 5}{2}\). Solving for \(x\), we get \(x = -\frac{5}{3}\).
  • For \(f(x) = 1\): Use \(1 = \frac{3x + 5}{2}\). Solving gives \(x = -\frac{3}{2}\).
  • For \(f(x) = -1\): Set \(-1 = \frac{3x + 5}{2}\). Solving this results in \(x = -\frac{9}{2}\).

Through solving these equations, we identify specific \(x\) values that satisfy each condition, thus enhancing our understanding of how the function behaves at these points.
Mathematical Problem Solving
Mathematical problem solving involves using processes and strategies to find solutions to mathematical questions. In the context of this exercise, it requires understanding the problem, planning a solution strategy, executing the calculations, and reviewing the results.

To address this exercise:
  • Understand the function and what is required by reading the problem statement thoroughly.
  • Evaluate and compare the function at given \(x\) values.
  • Solve for \(x\) where the function equals specific values.
  • Review the outcomes to ensure they are logical and satisfy the initial conditions.

Good problem solvers go through these stages systematically, adapting their approach as needed. This structured methodical method not only improves accuracy but also fosters deeper mathematical understanding.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Two sisters, Nina and Lori, part on a street corner. Lori saunters due north at a rate of 150 feet per minute and Nina jogs off due east at a rate of 320 feet per minute. Assuming they maintain their speeds and directions, express the distance between the sisters as a function of the number of minutes since they parted.

You are constructing a closed rectangular box with a square base and a volume of 200 cubic inches. If the material for the base and lid costs 10 cents per square inch and the material for the sides costs 7 cents per square inch, express the cost of material for the box as a function of \(s\), the length of the side of the base.

There are infinitely many prime numbers. This has been known for a long time; Euclid proved it sometime between 300 B.C. and 200 B.C. \({ }^{6}\) Number theorists (mathematicians who study the theory and properties of numbers) are interested in the distribution of prime numbers. Let \(P(n)=\) number of primes less than or equal to \(n\), where \(n\) is a positive number. Is \(P(n)\) a function? Explain.

(a) find the value of the function at \(x=0, x=1\), and \(x=-1\). (b) find all \(x\) such that the value of the function is \((i) 0,(i i) 1\), and \((i i i)-1 .\) $$ g(x)=x^{2}-1 $$

Writing: We would like to tailor this course to your needs and interests; therefore we'd like to find out more about what these needs and interests are. On a sheet of paper separate from the rest of your homework, please write a paragraph or two telling us a bit about yourself by addressing the following questions. (a) What are you interested in studying in the future, both in terms of math and otherwise? (b) Are there things you have found difficult or confusing in mathematics in the past? If so, what? (c) What was your approach to studying mathematics in the past? Did it work well for you? (d) What are your major extracurricular activities or interests? (e) What do you hope to get out of this course?

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.