Math Problem Statement

lim(x→2) [3f(x) / g(x)] with given that lim(x→2) f(x) = 4, lim(x→2) g(x) = -2, and lim(x→2) h(x) = 0

Solution

The limit problem you provided involves evaluating:

limx23f(x)g(x)\lim_{{x \to 2}} \frac{3f(x)}{g(x)}

Given that:

  • limx2f(x)=4\lim_{{x \to 2}} f(x) = 4
  • limx2g(x)=2\lim_{{x \to 2}} g(x) = -2
  • limx2h(x)=0\lim_{{x \to 2}} h(x) = 0

We can proceed by applying the limit laws. Since both f(x)f(x) and g(x)g(x) have defined limits as x2x \to 2, the limit of the quotient can be computed as:

limx23f(x)g(x)=3limx2f(x)limx2g(x)\lim_{{x \to 2}} \frac{3f(x)}{g(x)} = \frac{3 \cdot \lim_{{x \to 2}} f(x)}{\lim_{{x \to 2}} g(x)}

Substituting the given limits:

=342=122=6= \frac{3 \cdot 4}{-2} = \frac{12}{-2} = -6

So the solution is:

limx23f(x)g(x)=6\lim_{{x \to 2}} \frac{3f(x)}{g(x)} = -6

Would you like more details or have any additional questions?

Here are some related questions for deeper exploration:

  1. What are the properties of limits that allow for this simplification?
  2. How would the solution change if g(x)g(x) approached zero as x2x \to 2?
  3. What happens if either f(x)f(x) or g(x)g(x) has an undefined limit at x=2x = 2?
  4. How would you apply L'Hopital's rule to similar limit problems?
  5. Can you provide an example where limits involve piecewise functions?

Tip: Always check the denominator in a limit involving a quotient to avoid division by zero errors.

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Math Problem Analysis

Mathematical Concepts

Limits
Algebra
Calculus

Formulas

lim(x→a) [c·f(x)/g(x)] = (c·lim(x→a)f(x))/(lim(x→a)g(x))

Theorems

Limit Laws

Suitable Grade Level

Grades 11-12