Math Problem Statement

Use the graph to find the indicated limits.

Step 1 of 3 :

Find limx→2−f(x).

x−10 −5 5 10 y−10 −5 5 10 Cartesian Coordinate PlaneThe horizontal axis is labeled with x. The horizontal axis contains 21 grid lines, starts at -10, and ends at 10; and the axis is labeled with the values: -10, -5, 5, 10.The vertical axis is labeled with y. The vertical axis contains 21 grid lines, starts at -10, and ends at 10; and the axis is labeled with the values: -10, -5, 5, 10.Piecewise GraphThe graph is made up of a set of different curves, defined over the 2 regions,for the curves: Left Curve and Right Curve.Region 1The region of the coordinate plane containing horizontal values to the left of the value 2 units right of the origin and all vertical values.Left CurveA solid curve is drawn with the equation f(x)=34x−2+4.Left Curve AsymptoteA dashed vertical line segment is drawn 2 units right of the vertical axis.Region 2The region of the coordinate plane containing horizontal values to the right of the value 2 units right of the origin and all vertical values.Right CurveA solid curve is drawn with the equation f(x)=12(x−2)⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯√2+3to the right of the endpoint Right Curve Endpoint.Right Curve EndpointAn open circle drawn 2 units right of and 3 units above the origin.

Answer

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Solution

We are tasked with finding the limit of f(x)f(x) as xx approaches 2 from the left-hand side, i.e., limx2f(x)\lim_{x \to 2^-} f(x).

Key points to analyze:

  • Left Curve (Region 1): This is the part of the graph that represents f(x)f(x) for values of xx less than 2.
  • The equation of the left curve is given by f(x)=34x2+4f(x) = \frac{3}{4x - 2} + 4.
  • Right Curve (Region 2): The right side of the graph does not apply in this specific limit because we are interested in the behavior as x2x \to 2^-, which means approaching 2 from the left side.

Step-by-step process:

  1. Equation of the left curve: f(x)=34x2+4f(x) = \frac{3}{4x - 2} + 4 As x2x \to 2^-, we substitute x=2x = 2 in the function to analyze the behavior.

  2. Substitute x=2x = 2 into the expression: 4x2=4(2)2=82=64x - 2 = 4(2) - 2 = 8 - 2 = 6 Therefore, the function becomes: f(2)=36+4=0.5+4=4.5f(2^-) = \frac{3}{6} + 4 = 0.5 + 4 = 4.5

Thus, the limit of f(x)f(x) as xx approaches 2 from the left is: limx2f(x)=4.5\lim_{x \to 2^-} f(x) = 4.5

Do you want details on why I evaluated this way or have any other questions?

Here are 5 related questions:

  1. What is the difference between left-hand and right-hand limits?
  2. How does the presence of an asymptote affect limits?
  3. What would limx2+f(x)\lim_{x \to 2^+} f(x) be for this function?
  4. How do piecewise functions behave at points of discontinuity?
  5. What role do open and closed circles play on a graph?

Tip: Always check whether a graph has discontinuities or jumps when evaluating limits near critical points!

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Math Problem Analysis

Mathematical Concepts

Limits
Piecewise Functions
Left-Hand Limit

Formulas

f(x) = (3 / (4x - 2)) + 4

Theorems

Limit Theorem
Continuity and Discontinuity Theorems

Suitable Grade Level

Grades 11-12