What are the common functions used to solve limits in single variable calculus?

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The discussion focuses on identifying functions that approach infinity at varying rates for limit solving in single variable calculus. Participants suggest a hierarchy of functions, starting with logarithmic functions and progressing through power functions to exponential and factorial functions. There is uncertainty about the placement of trigonometric functions due to their oscillatory nature. Asymptotic analysis is recommended for a more accurate comparison of growth rates. The conversation emphasizes the complexity of creating a comprehensive list that includes all relevant functions.
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Homework Statement



Can you create a list of which functions increase towards infinity the fastest for limit solving?

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The Attempt at a Solution



I'm trying to make a list from least speed, to fastest speed, in approaching infinity.

As in, if you have a limit, and it has multiple types of functions, which function will be the largest, fastest.

I tried making my own little list, but I'm not sure how accurate it is, or if I'm missing any functions. Also, I'm not sure where trig functions would fit onto this list, or if they even do, because they oscillate. I'm just trying to make this for a friend.

Logarithmic > Square Root > Algebraic > Exponential ?
 
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You can use asymptotic analysis if you know how to.
You may also include in your list Power functions between Algebraic and Exponential, and Nth root between Logarithmic and Square Root.
 
There are lots of different functions depending on what you want to consider. Trouble will arise when making a list if you consider multiple factorials and exponentiations.

Maybe a starting point for a list would look something like:

$$\text{log}(x) < \text{log}(x \text{log}(x)) < x^n < b^x < x! < x^x$$

This barely covers a list of functions, and I'm not sure the list is what you are looking for.

For a more complete list of functions, see: https://en.wikipedia.org/wiki/List_of_mathematical_functions
 
StrongSpica said:
You can use asymptotic analysis if you know how to.
You may also include in your list Power functions between Algebraic and Exponential, and Nth root between Logarithmic and Square Root.

Zondrina said:
There are lots of different functions depending on what you want to consider. Trouble will arise when making a list if you consider multiple factorials and exponentiations.

Maybe a starting point for a list would look something like:

$$\text{log}(x) < \text{log}(x \text{log}(x)) < x^n < b^x < x! < x^x$$

This barely covers a list of functions, and I'm not sure the list is what you are looking for.

For a more complete list of functions, see: https://en.wikipedia.org/wiki/List_of_mathematical_functions

Thank you, I appreciate it, I was just looking for a basic list that encompasses everything one should know at a single variable calculus level!
 
Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?

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