Math Problem Statement

The graphs of f and g are given in the figure.

There are two curves graphed on the x y coordinate plane.

The first curve, labeled f, begins at the point (−4, −2), goes up and right passing through the points (−3, −1) and (−2, 1),reaches a maximum point at on the y-axis at y = 3, goes down and right passing through the point (2, 2), and ends at the point (4, −1).

The second curve, labeled g, begins at the approximate point (−4, 2.5), goes down and right passing through the point (−2, 1) intersecting f, reaches a minimum at approximately (0, 0.5), goes up and right passing through the point (2, 2)intersecting f, and ends at the point (3, 4).

(a)

State the values of 

f(2)

 and 

g(−2).

f(2)

g(−2)

(b)

Which is larger, 

f(3) or g(3)?

f(3)

g(3)

     

(c)

For what values of x is 

f(x) = g(x)?

 (Enter your answers as a comma-separated list.)

x =       (d)

On what interval(s) is 

f(x) ≤ g(x)?

 (Enter your answer using interval notation.)     (e)

State the solution of the equation 

f(x) = −1.

 (Enter your answers as a comma-separated list.)

x =       (f)

On what interval(s) is g decreasing? (Enter your answer using interval notation.)     (g)

State the domain and range of f. (Enter your answers using interval notation.)

domain     range      (h)

State the domain and range of g. (Enter your answers using interval notation.)

domain     range     

Solution

Let's break down and solve each part of the problem step by step based on the provided description of the graphs.

(a) State the values of f(2)f(2) and g(2)g(-2).

  • f(2)f(2): From the description, the function ff passes through the point (2, 2), so f(2)=2f(2) = 2.
  • g(2)g(-2): The function gg passes through the point (-2, 1), so g(2)=1g(-2) = 1.

(b) Which is larger, f(3)f(3) or g(3)g(3)?

  • From the description:
    • f(3)f(3) is between the points (2, 2) and (4, -1), likely slightly below the x-axis, which suggests it might be negative.
    • g(3)g(3) ends at the point (3, 4), meaning g(3)=4g(3) = 4.

Thus, g(3)g(3) is larger than f(3)f(3).

(c) For what values of xx is f(x)=g(x)f(x) = g(x)?

  • From the description, the functions ff and gg intersect at the points (-2, 1) and (2, 2).

Therefore, x=2,2x = -2, 2.

(d) On what interval(s) is f(x)g(x)f(x) \leq g(x)?

  • f(x)f(x) is less than or equal to g(x)g(x) where the graph of ff is below or on the graph of gg.
  • From the description, f(x)f(x) is below or equal to g(x)g(x) on the intervals (4,2](-4, -2] and [2,4][2, 4].

So, the answer is (4,2][2,4](-4, -2] \cup [2, 4].

(e) State the solution of the equation f(x)=1f(x) = -1.

  • From the description, f(x)=1f(x) = -1 at x=4x = 4.

So, x=4x = 4.

(f) On what interval(s) is g(x)g(x) decreasing?

  • g(x)g(x) is decreasing when the graph of gg is moving down as xx increases.
  • From the description, g(x)g(x) is decreasing on the interval (4,0)(-4, 0).

So, the interval is (4,0)(-4, 0).

(g) State the domain and range of ff.

  • Domain of ff: The function ff is defined from x=4x = -4 to x=4x = 4, so the domain is [4,4][-4, 4].
  • Range of ff: The lowest point on the graph of ff is 2-2 and the highest point is 33, so the range is [2,3][-2, 3].

(h) State the domain and range of gg.

  • Domain of gg: The function gg is defined from x=4x = -4 to x=3x = 3, so the domain is [4,3][-4, 3].
  • Range of gg: The lowest point on the graph of gg is approximately 0.50.5 and the highest point is 44, so the range is [0.5,4][0.5, 4].

Would you like more details or have any questions?


Here are 5 related questions for practice:

  1. What is the maximum value of g(x)g(x) and where does it occur?
  2. On what interval(s) is f(x)f(x) increasing?
  3. Find g(0)g(0) given the minimum point of gg.
  4. How many solutions does the equation f(x)=2f(x) = 2 have?
  5. Compare f(0)f(0) and g(0)g(0).

Tip: When comparing values of functions at specific points, it helps to visualize the graph to see where one function is higher or lower than the other.

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Math Problem Analysis

Mathematical Concepts

Functions
Graphing
Intersection of Functions
Domain and Range

Formulas

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Theorems

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Suitable Grade Level

Grades 9-10