Math Problem Statement

The graphs of the functions g(x) and h(x) are shown. Determine the following limits: (a) lim (x→-2) h(x), (b) lim (x→1) g(h(x)), (c) lim (x→-2) h(g(x)).

Solution

Let's analyze the graph and solve the limits step by step.

(a) limx2h(x)\lim_{x \to -2} h(x)

Looking at the graph of h(x)h(x), as x2x \to -2, the value of h(x)h(x) approaches 2 from both sides (left and right).

Thus, limx2h(x)=2.\lim_{x \to -2} h(x) = 2.

(b) limx1g(h(x))\lim_{x \to 1} g(h(x))

First, find h(1)h(1) from the graph of h(x)h(x). At x=1x = 1, h(1)=0h(1) = 0.

Next, we need to evaluate g(0)g(0). From the graph of g(x)g(x), g(0)=1g(0) = 1.

Thus, limx1g(h(x))=g(0)=1.\lim_{x \to 1} g(h(x)) = g(0) = 1.

(c) limx2h(g(x))\lim_{x \to -2} h(g(x))

First, find g(2)g(-2) from the graph of g(x)g(x). At x=2x = -2, g(2)=2g(-2) = 2.

Now, we need to evaluate h(2)h(2). From the graph of h(x)h(x), as x2x \to 2, there is a discontinuity. The left-hand limit h(2)=2h(2^-) = 2, and the right-hand limit h(2+)=0h(2^+) = 0. Since these two limits are not equal, the limit does not exist.

Thus, limx2h(g(x))=DNE (Does Not Exist).\lim_{x \to -2} h(g(x)) = \text{DNE} \ (\text{Does Not Exist}).


Would you like further explanation on any of these points or details on limit properties?

Here are five related questions for further practice:

  1. What is limx1h(x)\lim_{x \to 1} h(x)?
  2. What is limx1g(x)\lim_{x \to -1} g(x)?
  3. Determine limx3h(x)\lim_{x \to 3} h(x), if it exists.
  4. What is g(h(1))g(h(-1))?
  5. What is h(g(1))h(g(1))?

Tip: When evaluating composite limits like g(h(x))g(h(x)), always check both the inner and outer functions step by step.

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Math Problem Analysis

Mathematical Concepts

Limits
Continuity
Graph Interpretation

Formulas

lim (x→a) f(x)
Composite functions: g(h(x)) and h(g(x))

Theorems

Limit existence theorem
Composite function limit theorem

Suitable Grade Level

Grades 11-12 (Precalculus/Calculus)