Math Problem Statement

Complete the table of values for the functions f(x) = 3x + 1 and g(x) = (2/3)^x. Based on the values in the table, where does the equation f(x) = g(x) have a solution?

Solution

Let's solve this step-by-step:

1. Understand the Functions

  • f(x)=3x+1f(x) = 3x + 1
  • g(x)=(23)xg(x) = \left(\frac{2}{3}\right)^x

2. Complete the Table

Let's compute f(x)f(x) and g(x)g(x) for the given values of xx:

For x=0x = 0:

  • f(0)=3(0)+1=1f(0) = 3(0) + 1 = 1
  • g(0)=(23)0=1g(0) = \left(\frac{2}{3}\right)^0 = 1

For x=2x = 2:

  • f(2)=3(2)+1=7f(2) = 3(2) + 1 = 7
  • g(2)=(23)2=(23)×(23)=49g(2) = \left(\frac{2}{3}\right)^2 = \left(\frac{2}{3}\right) \times \left(\frac{2}{3}\right) = \frac{4}{9}

For x=3x = 3:

  • f(3)=3(3)+1=10f(3) = 3(3) + 1 = 10
  • g(3)=(23)3=(23)×(23)×(23)=827g(3) = \left(\frac{2}{3}\right)^3 = \left(\frac{2}{3}\right) \times \left(\frac{2}{3}\right) \times \left(\frac{2}{3}\right) = \frac{8}{27}

3. Fill in the Table

Based on the calculations:

xxf(x)f(x)g(x)g(x)
-1-232\frac{3}{2}
011
1423\frac{2}{3}
2749\frac{4}{9}
310827\frac{8}{27}

4. Determine Where f(x)=g(x)f(x) = g(x)

We need to find where the equation f(x)=g(x)f(x) = g(x) has a solution based on the table:

  • For x=1x = -1, f(x)=2f(x) = -2 and g(x)=32g(x) = \frac{3}{2}. f(x)<g(x)f(x) < g(x).
  • For x=0x = 0, f(x)=1f(x) = 1 and g(x)=1g(x) = 1. f(x)=g(x)f(x) = g(x).
  • For x=1x = 1, f(x)=4f(x) = 4 and g(x)=23g(x) = \frac{2}{3}. f(x)>g(x)f(x) > g(x).

The values of f(x)f(x) and g(x)g(x) are equal at x=0x = 0. Hence, the equation f(x)=g(x)f(x) = g(x) has a solution at x=0x = 0.

5. Answer the Question

Based on the values in the table, the correct answer is:

  • x=0x = 0

Would you like further details or have any questions?

Follow-Up Questions

  1. What happens to the functions f(x)f(x) and g(x)g(x) as xx increases?
  2. Can you find an interval where f(x)<g(x)f(x) < g(x)?
  3. What kind of function is g(x)=(23)xg(x) = \left(\frac{2}{3}\right)^x?
  4. Why does g(x)g(x) decrease as xx increases?
  5. Can there be more than one solution to f(x)=g(x)f(x) = g(x)?

Tip

When comparing two functions, plotting them on a graph can provide a clearer visual understanding of where they intersect.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Exponential Functions
Linear Functions

Formulas

f(x) = 3x + 1
g(x) = (2/3)^x

Theorems

-

Suitable Grade Level

Grades 8-10