Math Problem Statement

f(x) = 1 / (x + 1)^2, x ≥ 0

Solution

The given function is:

f(x)=1(x+1)2,wherex0f(x) = \frac{1}{(x+1)^2}, \quad \text{where} \quad x \geq 0

This is a rational function that involves a denominator of (x+1)2(x+1)^2. It is defined for x0x \geq 0 as specified.

Key features of this function:

  1. Domain: The function is defined for x0x \geq 0. The expression in the denominator, (x+1)2(x+1)^2, is always positive and does not cause division by zero for x0x \geq 0.

  2. Asymptotes:

    • Horizontal asymptote: As xx \to \infty, the function approaches 0 because the denominator grows much faster than the numerator. Thus, y=0y = 0 is a horizontal asymptote.
    • No vertical asymptote: Since the denominator does not become zero for x0x \geq 0, there is no vertical asymptote.
  3. Behavior near x=0x = 0: When x=0x = 0, f(0)=1(0+1)2=1f(0) = \frac{1}{(0+1)^2} = 1. The function is decreasing as xx increases from 0 onwards.

  4. Monotonicity: The function is strictly decreasing for all x0x \geq 0 because as xx increases, the denominator increases, making f(x)f(x) smaller.

Would you like a detailed derivative analysis or more information on another feature of the function?

Relative Questions:

  1. What is the derivative of f(x)=1(x+1)2f(x) = \frac{1}{(x+1)^2}?
  2. How would you find the minimum value of the function f(x)f(x)?
  3. Can you explain the concavity of this function based on the second derivative?
  4. What is the behavior of the function as x0+x \to 0^+?
  5. How would you integrate the function f(x)f(x) over a given interval?

Tip:

Always check for asymptotic behavior in rational functions—both horizontal and vertical asymptotes give important information about the limits of the function.

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Math Problem Analysis

Mathematical Concepts

Rational Functions
Asymptotic Behavior
Monotonicity

Formulas

f(x) = 1 / (x + 1)^2
Asymptotes
Limits

Theorems

Limits and Asymptotes
Monotonicity Theorem

Suitable Grade Level

Grades 10-12