Math Problem Statement

Consider the graph of some function y = f(x). Evaluate the following limits: lim x→1 f(x), lim x→0 f(x), and lim x→4^- f(x).

Solution

Let’s walk through the graph to evaluate the limits based on the function y=f(x)y = f(x).

The task asks for:

  1. limx1f(x)\lim_{x \to 1} f(x)
  2. limx0f(x)\lim_{x \to 0} f(x)
  3. limx4f(x)\lim_{x \to 4^-} f(x)

Step-by-Step Evaluation

  1. Evaluating limx1f(x)\lim_{x \to 1} f(x):

    • As xx approaches 1 from both sides, the function values appear to get closer to 5 (where the curve meets the point at (1,5)(1, 5)).
    • Thus, limx1f(x)=5\lim_{x \to 1} f(x) = 5.
  2. Evaluating limx0f(x)\lim_{x \to 0} f(x):

    • As xx approaches 0 from both the left and right, the function value stabilizes around 3 (since the graph passes smoothly through (0,3)(0, 3)).
    • So, limx0f(x)=3\lim_{x \to 0} f(x) = 3.
  3. Evaluating limx4f(x)\lim_{x \to 4^-} f(x):

    • When xx approaches 4 from the left side, the function value seems to approach -3.
    • There is no discontinuity as we approach 4 from the left.
    • Therefore, limx4f(x)=3\lim_{x \to 4^-} f(x) = -3.

Answer Matching

Based on our evaluations:

  • limx1f(x)=5\lim_{x \to 1} f(x) = 5
  • limx0f(x)=3\lim_{x \to 0} f(x) = 3
  • limx4f(x)=3\lim_{x \to 4^-} f(x) = -3

Thus, the correct answer is the option:

  • limx1f(x)=5\lim_{x \to 1} f(x) = 5, limx0f(x)=3\lim_{x \to 0} f(x) = 3, limx4f(x)=3\lim_{x \to 4^-} f(x) = -3

Follow-Up Questions:

  1. What is the definition of a left-hand and right-hand limit?
  2. How can you identify discontinuities in a graph based on the limit behavior?
  3. What does it mean if a limit does not exist at a point?
  4. How do piecewise functions affect limit evaluations?
  5. What role do removable discontinuities play in limits?

Tip: Always compare the left-hand and right-hand limits at a point. If they differ, the limit at that point does not exist!

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Math Problem Analysis

Mathematical Concepts

Limits
Continuity
Graph Analysis

Formulas

-

Theorems

Limit definition
Left-hand and right-hand limits

Suitable Grade Level

Grades 10-12