Lim n to infinity for factorial

In summary, the conversation discusses the limit as n approaches infinity for (n!)^(1/n). The person suggests using Stirling's formula for n! to find the limit, and notes that the limit of the product of (n!)^(1/n) is not one.
  • #1
noobiez
1
0

Homework Statement


lim n -> infinity for (n!)^(1/n)


Homework Equations





The Attempt at a Solution


hmm, i know that lim n approaches infinity, (n)^(1/n) will go to 1, but issit the same for n!?
 
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  • #2
You might do this: n!= 1*2*3*...* (n-1)*n so it has exactly n factors. (n!)^(1/n)= (1)^(1/n)(2)^(1/n)(3)^(1/2)*...*(n-1)^(1/n)*n^(1/n). Now you say that you know that n^(1/n) goes to 1. What do you think the other numbers go to? In particular, what does 2^(1/n) or 3^(1/n) go to? If you don't know try looking at 2^(1/100000) or 3^(1/100000). What does the product of thing like that go to?
 
  • #3
HallsofIvy said:
You might do this: n!= 1*2*3*...* (n-1)*n so it has exactly n factors. (n!)^(1/n)= (1)^(1/n)(2)^(1/n)(3)^(1/2)*...*(n-1)^(1/n)*n^(1/n). Now you say that you know that n^(1/n) goes to 1. What do you think the other numbers go to? In particular, what does 2^(1/n) or 3^(1/n) go to? If you don't know try looking at 2^(1/100000) or 3^(1/100000). What does the product of thing like that go to?

?? All of those limits may be one. But the limit of the product certainly isn't one. Use Stirling's formula for n!.
 

1. What does "Lim n to infinity for factorial" mean?

Lim n to infinity for factorial refers to the limit of a sequence where the value of n approaches infinity, and the sequence is defined by the factorial function. In other words, it is the value that the factorial function approaches as n gets larger and larger.

2. How is "Lim n to infinity for factorial" calculated?

The calculation of "Lim n to infinity for factorial" is done by taking the limit of the factorial function as n approaches infinity. This can be done algebraically or graphically, depending on the specific sequence.

3. What is the significance of "Lim n to infinity for factorial" in mathematics?

"Lim n to infinity for factorial" is significant in mathematics as it helps in understanding the behavior of sequences that grow rapidly, such as factorial sequences. It also has applications in areas such as probability, statistics, and number theory.

4. Can "Lim n to infinity for factorial" be used to find the value of infinity factorial?

No, "Lim n to infinity for factorial" cannot be used to find the value of infinity factorial. This is because infinity factorial is an undefined concept, and taking the limit of the factorial function as n approaches infinity does not lead to a specific value.

5. Are there any real-world applications of "Lim n to infinity for factorial"?

Yes, there are several real-world applications of "Lim n to infinity for factorial." One example is in the analysis of algorithms, where the factorial function can be used to represent the time complexity of certain algorithms and the limit of the factorial function can be used to analyze the algorithm's efficiency as the input size grows.

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