Math Problem Statement

Evaluate the limits

Solution

The image you provided contains some mathematical limits that need to be evaluated. I will analyze and solve the limits based on what is visible in the image.

Analysis

The image seems to include several limit problems. Here's the structure:

  1. The first limit involves a rational expression: limxxnaxn1a0bxmb1xm1b0\lim_{x \to \infty} \frac{x^n - ax^{n-1} - \dots - a_0}{bx^m - b_1x^{m-1} - \dots - b_0} It appears that the limit is evaluated for xx approaching infinity.

  2. The second limit also involves a rational expression: limx0x3xx2\lim_{x \to 0} \frac{x^3 - x}{x - 2}

  3. The third limit shown appears to involve a trigonometric function: limx0sin(x)x\lim_{x \to 0} \frac{\sin(x)}{x}

Solutions

1. limxxnaxn1a0bxmb1xm1b0\lim_{x \to \infty} \frac{x^n - ax^{n-1} - \dots - a_0}{bx^m - b_1x^{m-1} - \dots - b_0}

  • Case 1: If n>mn > m, the limit is \infty.
  • Case 2: If n<mn < m, the limit is 00.
  • Case 3: If n=mn = m, the limit is 1b\frac{1}{b}.

2. limx0x3xx2\lim_{x \to 0} \frac{x^3 - x}{x - 2}

For small xx, the expression simplifies as follows:

limx0x(x21)x2=02=0\lim_{x \to 0} \frac{x(x^2 - 1)}{x - 2} = \frac{0}{-2} = 0

So, the limit is 0.

3. limx0sin(x)x\lim_{x \to 0} \frac{\sin(x)}{x}

This is a well-known limit in calculus:

limx0sin(x)x=1\lim_{x \to 0} \frac{\sin(x)}{x} = 1

Summary of Answers:

  1. The first limit depends on the relationship between nn and mm.
  2. The second limit as x0x \to 0 evaluates to 00.
  3. The third limit evaluates to 11.

Would you like further details, or do you have any questions?

Here are five related questions:

  1. How do you evaluate limits of rational functions as xx approaches infinity?
  2. What are common indeterminate forms, and how are they resolved?
  3. What are the fundamental trigonometric limits?
  4. How can L'Hôpital's Rule be applied to evaluate limits?
  5. How do you handle limits involving piecewise functions?

Tip: For rational functions, always compare the highest powers in the numerator and denominator to simplify the limit evaluation.

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Math Problem Analysis

Mathematical Concepts

Limits
Rational Functions
Trigonometric Limits

Formulas

\( \lim_{x \to a} f(x) \) definition
L'Hôpital's Rule

Theorems

Limit properties
Trigonometric limits

Suitable Grade Level

Advanced High School and Above