Math Problem Statement

Given that

 lim x→2 f(x) = 4    lim x→2 g(x) = −2    lim x→2 h(x) = 0,

find the limits, if they exist. (If an answer does not exist, enter DNE.) (e)    

lim x→2 

g(x)/h(x)

Solution

We are tasked with evaluating:

limx2g(x)h(x)\lim_{x \to 2} \frac{g(x)}{h(x)}

Given that:

  • limx2g(x)=2\lim_{x \to 2} g(x) = -2
  • limx2h(x)=0\lim_{x \to 2} h(x) = 0

Now, we substitute these limit values into the expression:

limx2g(x)h(x)=20\lim_{x \to 2} \frac{g(x)}{h(x)} = \frac{-2}{0}

Since we are dividing a non-zero number by zero, this results in an undefined limit. Specifically, division by zero typically leads to an infinite limit, but whether it is positive or negative infinity depends on the behavior of h(x)h(x) as xx approaches 2 from both sides. However, since we're not given any information about whether h(x)h(x) approaches zero from the positive or negative direction, we cannot conclude whether the result is ++\infty or -\infty.

Thus, the answer is DNE (Does Not Exist).

Would you like a detailed breakdown of why division by zero leads to this result?


Here are 5 related questions for further exploration:

  1. What happens when you divide by zero in a limit if the numerator is also zero?
  2. How can we apply L'Hopital's Rule to indeterminate forms like 00\frac{0}{0}?
  3. What conditions guarantee that a limit involving division does not exist?
  4. Can you think of a case where dividing by zero gives a finite value in limits?
  5. What is the significance of one-sided limits in understanding division by zero?

Tip: When dividing by a function that tends to zero, always check the sign of the denominator as you approach the limit to avoid undefined results!

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Math Problem Analysis

Mathematical Concepts

Limits
Indeterminate Forms
Division by Zero

Formulas

lim x→c f(x)/g(x)

Theorems

Limit Laws
Indeterminate Form of Type k/0

Suitable Grade Level

Grades 10-12