Math Problem Statement

Misalkan fungsi f, g, dan h merupakan fungsi yang memenuhi sifat berikut: lim(x->3)f(x) = 4, lim(x->3)g(x) = 3, lim(x->3)h(x) = 2. Tentukanlah lim(x->3)[8g(x) - 4h(x)] / (f(x))^2

Solution

The problem on your screen involves calculating a limit expression. It is given that:

limx3f(x)=4,limx3g(x)=3,limx3h(x)=2.\lim_{x \to 3} f(x) = 4, \quad \lim_{x \to 3} g(x) = 3, \quad \lim_{x \to 3} h(x) = 2.

You are asked to find:

limx38g(x)4h(x)(f(x))2.\lim_{x \to 3} \frac{8g(x) - 4h(x)}{(f(x))^2}.

Step-by-step solution:

  1. First, apply the limits of g(x)g(x), h(x)h(x), and f(x)f(x) as xx approaches 3.

limx38g(x)=8×3=24,\lim_{x \to 3} 8g(x) = 8 \times 3 = 24, limx34h(x)=4×2=8,\lim_{x \to 3} 4h(x) = 4 \times 2 = 8, limx3(f(x))2=(4)2=16.\lim_{x \to 3} (f(x))^2 = (4)^2 = 16.

  1. Now substitute these limit values into the original expression:

limx38g(x)4h(x)(f(x))2=24816=1616=1.\lim_{x \to 3} \frac{8g(x) - 4h(x)}{(f(x))^2} = \frac{24 - 8}{16} = \frac{16}{16} = 1.

Thus, the answer is 1.

Would you like further details or have any questions?

Related Questions:

  1. How do you apply L'Hôpital's rule to more complex limits?
  2. What is the meaning of the limit of a function as xx approaches a number?
  3. How does the concept of continuity affect the calculation of limits?
  4. What is the difference between one-sided and two-sided limits?
  5. Can you explain the different types of indeterminate forms in limit problems?

Tip: When dealing with limits, always check if direct substitution works before trying other methods like L'Hôpital's rule.

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Math Problem Analysis

Mathematical Concepts

Limits
Algebra

Formulas

lim(x -> c) f(x) = L
lim(x -> c) [a*f(x) + b*g(x)] = a*L + b*M

Theorems

Limit substitution theorem

Suitable Grade Level

Grades 10-12