Math Problem Statement

The graph of a function f is shown above. Which of the following statements about f is false?

Solution

Looking at the graph provided and the given options, let's analyze the statements one by one:

  1. Statement A: "f is continuous at x=ax = a"

    • From the graph, we can see that there is a discontinuity at x=ax = a because there is a hole (open circle) at that point. The function does not take a value at x=ax = a, so this statement is false.
  2. Statement B: "f has a relative maximum at x=ax = a"

    • The function seems to reach a peak at x=ax = a, indicating a relative maximum. Thus, this statement is true.
  3. Statement C: "x = a is in the domain of f"

    • Since the graph has a hole at x=ax = a, it means the function is not defined at this point. So, this statement is false.
  4. Statement D: "The right-hand limit and left-hand limit of ff as xx approaches aa are equal"

    • Both the left-hand and right-hand limits appear to approach the same value as xx approaches aa, even though the function is not defined at x=ax = a. Hence, this statement is true.
  5. Statement E: "The limit of f(x)f(x) as xx approaches aa exists"

    • Since both the left-hand and right-hand limits exist and are equal, the limit exists. Thus, this statement is true.

Conclusion:

The false statement is A. The function is not continuous at x=ax = a.


Do you want more details or have any further questions? Here are some related questions:

  1. What is the formal definition of continuity at a point?
  2. How do we calculate left-hand and right-hand limits?
  3. What are the necessary conditions for a relative maximum or minimum?
  4. Why is it important that limits from both sides agree for the limit to exist?
  5. How do discontinuities affect the behavior of a function?

Tip: Always check for open and closed circles in graphs—they indicate whether a function is defined at that point.

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Math Problem Analysis

Mathematical Concepts

Limits
Continuity
Domain
Relative Maximum

Formulas

Limit: lim(x→a) f(x)
Right-hand and Left-hand limits

Theorems

Continuity at a point
Limit existence theorem

Suitable Grade Level

Grades 11-12 (Pre-Calculus or Calculus)