Math Problem Statement

what is limx->infinity of arctan(x)/x

Solution

To evaluate the limit limxarctan(x)x\lim_{{x \to \infty}} \frac{\arctan(x)}{x}, let's follow these steps:

Step 1: Behavior of arctan(x)\arctan(x) as xx \to \infty

The arctangent function arctan(x)\arctan(x) approaches π2\frac{\pi}{2} as xx \to \infty. So:

limxarctan(x)=π2\lim_{{x \to \infty}} \arctan(x) = \frac{\pi}{2}

Step 2: Apply the limit to the given expression

Now, let's consider the ratio arctan(x)x\frac{\arctan(x)}{x}. As xx grows very large:

  • The numerator, arctan(x)\arctan(x), approaches π2\frac{\pi}{2}, which is a constant.
  • The denominator, xx, grows without bound.

This means we are essentially dividing a constant by an infinitely large number:

[ \lim_{{x \to \infty}} \frac{\arct

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Math Problem Analysis

Mathematical Concepts

Calculus
Limits
Trigonometric Functions

Formulas

lim{x -> ∞} (arctan(x)/x)
lim{x -> ∞} arctan(x) = π/2

Theorems

Limit Theorem
Behavior of arctangent function

Suitable Grade Level

Grades 11-12