Math Problem Statement

Answer all of the questions below about the function f(x) graphed below when x = 3.

Solution

Let's analyze the function f(x)f(x) from the graph provided and address the limit-related questions when x=3x = 3.

Key Points from the Graph:

  1. limx3f(x)\lim_{x \to 3^-} f(x):

    • This represents the left-hand limit as xx approaches 3 from the left. From the graph, as xx approaches 3 from the left, the function value approaches 3-3.
    • Answer: limx3f(x)=3\lim_{x \to 3^-} f(x) = -3.
  2. limx3+f(x)\lim_{x \to 3^+} f(x):

    • This is the right-hand limit as xx approaches 3 from the right. As x3+x \to 3^+, the graph also shows the function approaching 3-3.
    • Answer: limx3+f(x)=3\lim_{x \to 3^+} f(x) = -3.
  3. limx3f(x)\lim_{x \to 3} f(x):

    • This is the general limit as xx approaches 3. Since both the left-hand and right-hand limits are equal (both are 3-3), the general limit exists and is 3-3.
    • Answer: limx3f(x)=3\lim_{x \to 3} f(x) = -3.
  4. f(3)f(3):

    • This is the value of the function at x=3x = 3. From the graph, there is a hole at x=3x = 3, indicating that the function is not defined at this point.
    • Answer: f(3)f(3) is undefined.

Final Answers:

  1. limx3f(x)=3\lim_{x \to 3^-} f(x) = -3
  2. limx3+f(x)=3\lim_{x \to 3^+} f(x) = -3
  3. limx3f(x)=3\lim_{x \to 3} f(x) = -3
  4. f(3)f(3) is undefined.

Would you like more details on limits or have any other questions?

Here are some follow-up questions:

  1. What is the difference between a one-sided and two-sided limit?
  2. How can you determine if a function is continuous at a given point?
  3. Why is f(3)f(3) undefined in this graph?
  4. What conditions are needed for the existence of limxaf(x)\lim_{x \to a} f(x)?
  5. Can you describe an example where the left and right limits are not equal?

Tip: When analyzing limits, always check for any discontinuities like holes, jumps, or vertical asymptotes in the graph.

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Math Problem Analysis

Mathematical Concepts

Limits
One-Sided Limits
Discontinuities
Function Evaluation

Formulas

\lim_{x \to a^-} f(x)
\lim_{x \to a^+} f(x)
\lim_{x \to a} f(x)

Theorems

Limit Existence Theorem
Continuity of Functions

Suitable Grade Level

Grades 11-12