Math Problem Statement

Graphs of the functions f and g are given. (a) Which is larger, f(0) or g(0)? (b) Which is larger, f(-3) or g(-3)? (c) For which values of x is f(x) = g(x)? (d) Find the values of x for which f(x) ≤ g(x). (e) Find the values of x for which f(x) > g(x).

Solution

Let's work through the given questions based on the graph of the functions f(x)f(x) (red curve) and g(x)g(x) (blue curve).

(a) Which is larger, f(0)f(0) or g(0)g(0)?

  • From the graph, at x=0x = 0, the red curve f(x)f(x) is at y=2y = 2, and the blue curve g(x)g(x) is at y=0y = 0.
  • Answer: f(0)f(0) is larger because f(0)=2f(0) = 2 and g(0)=0g(0) = 0.

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

  • From the graph, at x=3x = -3, f(x)f(x) appears to be at around y=1y = 1, while g(x)g(x) is at a negative value, around y=2y = -2.
  • Answer: f(3)f(-3) is larger because f(3)1f(-3) \approx 1 and g(3)2g(-3) \approx -2.

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

  • From the graph, the two curves intersect at two points: around x=2x = -2 and x=2x = 2.
  • Answer: f(x)=g(x)f(x) = g(x) at x=2x = -2 and x=2x = 2.

(d) Find the values of xx for which 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 red curve is either below or touching the blue curve.
  • From the graph, this happens in the intervals (,2][2,)(-\infty, -2] \cup [2, \infty).
  • Answer: f(x)g(x)f(x) \leq g(x) for x(,2][2,)x \in (-\infty, -2] \cup [2, \infty).

(e) Find the values of xx for which f(x)>g(x)f(x) > g(x).

  • f(x)f(x) is greater than g(x)g(x) where the red curve is above the blue curve.
  • From the graph, this happens between x=2x = -2 and x=2x = 2, not including those points.
  • Answer: f(x)>g(x)f(x) > g(x) for x(2,2)x \in (-2, 2).

Would you like more details on any of these answers? Here are some related questions for further practice:

  1. What is the behavior of f(x)f(x) and g(x)g(x) as xx \to \infty?
  2. At what points does the slope of f(x)f(x) equal zero?
  3. What is the maximum value of g(x)g(x) and at what xx-value does it occur?
  4. Where does the function g(x)g(x) have a minimum value?
  5. Can you determine whether the functions are increasing or decreasing at x=1x = 1?

Tip: When solving graphically, always focus on the relative positions of the curves to compare their values at specific points.

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Math Problem Analysis

Mathematical Concepts

Functions
Graphical Inequalities
Intersection of Functions

Formulas

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Theorems

Function comparison via graph

Suitable Grade Level

Grades 9-12