Chapter 1: Problem 11
Find the limits. $$ \lim _{x \rightarrow+\infty} \sqrt{x} $$
Short Answer
Expert verified
The limit is \( +\infty \).
Step by step solution
01
Understand the Function
The function given is \( \sqrt{x} \), which represents the square root of \( x \). As \( x \) approaches infinity, the function describes how the square root behaves as the input values grow very large.
02
Analyze the Behavior at Infinity
Consider what happens to \( \sqrt{x} \) as \( x \) becomes very large. Intuitively, as \( x \) increases, \( \sqrt{x} \) also increases, but at a slower rate than \( x \) because finding the square root reduces the size of the number significantly.
03
Calculate the Limit
Formally, as \( x \to +\infty \), the values of \( \sqrt{x} \) increase without bound. This is because no matter how large \( x \) is, \( \sqrt{x} \) will be some positive number that continues to grow larger.
04
Conclude the Solution
Since \( \sqrt{x} \to +\infty \) as \( x \to +\infty \), the limit is \( +\infty \).
Unlock Step-by-Step Solutions & Ace Your Exams!
-
Full Textbook Solutions
Get detailed explanations and key concepts
-
Unlimited Al creation
Al flashcards, explanations, exams and more...
-
Ads-free access
To over 500 millions flashcards
-
Money-back guarantee
We refund you if you fail your exam.
Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!
Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Infinite Limits
When discussing infinite limits in calculus, we explore how a function behaves as its input approaches infinity. In the case of the square root function \( \sqrt{x} \), we study what happens as \( x \) becomes increasingly large. Infinite limits help us evaluate the function's growth rate at extreme values.For \( \lim_{x \to +\infty} \sqrt{x} \), the result is \( +\infty \). This means the square root of \( x \) continues to grow indefinitely as \( x \) increases. However, it's essential to understand that not all functions increase at the same rate as they approach infinity. Functions such as \( x^2 \) or exponential functions increase much faster.Recognizing an infinite limit provides insights into the long-term behavior of functions, which is very useful in various fields, such as physics and engineering.
Square Root Function
The square root function \( \sqrt{x} \) is a fundamental mathematical concept. It works by finding the number that, when multiplied by itself, gives \( x \). This function has several unique properties:
- It's only defined for non-negative \( x \), meaning \( \sqrt{x} \) is part of the domain \([0, \infty)\).
- The function increases as \( x \) increases, but it does so more slowly than linear functions.
Asymptotic Behavior
Asymptotic behavior in mathematical terms refers to how a function behaves as its input grows very large or tends towards a specific value. When studying limits, understanding asymptotic behaviors allows us to predict how a function approaches infinity or other target values.For the function \( \sqrt{x} \), as \( x \to +\infty \), the asymptotic behavior indicates that \( \sqrt{x} \) continues to increase without bounds, albeit slower than \( x \) does. This slow growth is typical of functions undergoing a radical transformation, such as square roots or cube roots.Recognizing asymptotic behavior enables learners to intuitively grasp how sometimes even a moderate increase in input can result in significant changes in output. Such insights help in designing systems that anticipate or rely on extreme conditions in engineering and statistical contexts.