Math Problem Statement

Use the given graph of f to state the value of each quantity, if it exists. (If an answer does not exist, enter DNE.) (a) lim x → 2- f(x) (b) lim x → 2+ f(x) (c) lim x → 2 f(x) (d) f(2) (e) lim x → 4 f(x)

Solution

Let's analyze the graph and solve the limits and function values step by step. Based on the image you uploaded, I will interpret the graph and the questions as follows:

Problem breakdown:

  • (a) limx2f(x)\lim_{x \to 2^-} f(x): The left-hand limit as xx approaches 2 from the left.
  • (b) limx2+f(x)\lim_{x \to 2^+} f(x): The right-hand limit as xx approaches 2 from the right.
  • (c) limx2f(x)\lim_{x \to 2} f(x): The two-sided limit as xx approaches 2.
  • (d) f(2)f(2): The value of the function at x=2x = 2.
  • (e) limx4f(x)\lim_{x \to 4} f(x): The limit as xx approaches 4.

Analysis of the graph:

For x=2x = 2 (Parts a, b, c, d):

  • From the graph, as x2x \to 2^-, the function f(x)f(x) approaches 00.
  • As x2+x \to 2^+, the function f(x)f(x) approaches 22.
  • The two-sided limit limx2f(x)\lim_{x \to 2} f(x) does not exist (DNE) because the left-hand and right-hand limits are not equal.
  • f(2)f(2) appears to be f(2)=0f(2) = 0, as the function touches the x-axis at x=2x = 2.

For x=4x = 4 (Part e):

  • As x4x \to 4, the function f(x)f(x) approaches 22. The graph is continuous around x=4x = 4, so the limit exists and is 22.

Final Answers:

  • (a) limx2f(x)=0\lim_{x \to 2^-} f(x) = 0
  • (b) limx2+f(x)=2\lim_{x \to 2^+} f(x) = 2
  • (c) limx2f(x)=DNE\lim_{x \to 2} f(x) = \text{DNE} (since the left and right limits are not equal)
  • (d) f(2)=0f(2) = 0
  • (e) limx4f(x)=2\lim_{x \to 4} f(x) = 2

Would you like further clarification or more details on any part of this?

Here are 5 related questions that can expand on the concepts discussed:

  1. What conditions must be met for the two-sided limit limxcf(x)\lim_{x \to c} f(x) to exist?
  2. How do you find the limit of a function when given its graph?
  3. What is the difference between a removable discontinuity and a jump discontinuity?
  4. How can the value of a function at a point differ from its limit at that point?
  5. Why does the limit not exist at x=2x = 2 in this case?

Tip: When dealing with piecewise functions or discontinuities, always check left-hand and right-hand limits separately to confirm the overall limit.

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Math Problem Analysis

Mathematical Concepts

Calculus
Limits
Continuity
Piecewise Functions

Formulas

Limit formula lim x → c f(x)
Right-hand and left-hand limits

Theorems

Limit existence theorem

Suitable Grade Level

Grades 11-12 (High School Calculus)