How can i show that both limits exist and are equal to 0? I attached

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In summary, both limits exist and are equal to 0. However, the second one is not as easy to solve as the first.
  • #1
ozlem675
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How can i show that both limits exist and are equal to 0? I attached limits as bmp file

"i" refers to "i times" not complex number so you can ignore. This formula is calculated after analysis of algortihms by using summations.
 

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  • #2


ozlem675 said:
How can i show that both limits exist and are equal to 0? I attached limits as bmp file

"i" refers to "i times" not complex number so you can ignore. This formula is calculated after analysis of algortihms by using summations.
https://www.physicsforums.com/attachment.php?attachmentid=33439&d=1300925084

Is the [tex]\sqrt{\log\ n}[/tex] an exponent?

.
 
  • #3


Yes, it is an exponent
 
  • #4


I think the 2nd one is pretty straight forward with L'Hopital's rule.

[tex]2^{\sqrt{\log\,x}}=e^{(\log\,2)\sqrt{\log\,x}}[/tex]

Added in Edit:

Well, I made a mistake, so it's not so easy.

But...

For the first one, try i = 1. That does work using L'Hopital. Then use induction, assuming that i is a positive integer,
 
Last edited:
  • #5


I thought i can solve this limit by L' Hopital's Rule but after derivatives of both parts. The first one is equal to 0 but i have problem with the second one. Can i rewrite log as n^1/2 but I'm not sure about it since the log itself is square root not the "n" nor "2". The second one is equal to 0 after rewriting log but not the first one. Or should i take derivative not once but until the second one is equal to zero which i haven't tried yet since I'm not sure about rewriting log
 
  • #6


ozlem675 said:
I thought i can solve this limit by L' Hopital's Rule but after derivatives of both parts.
...
Can i rewrite log as n^1/2 but I'm not sure about it since the log itself is square root not the "n" nor "2"?
...
No.

[tex]\frac{1}{2}\,\log(x)=\log(\sqrt{x})[/tex]

but: [tex]\sqrt{\log(x)}\neq\sqrt{x}[/tex]
 

FAQ: How can i show that both limits exist and are equal to 0? I attached

How can I prove that both limits exist for a given function?

To prove that both limits exist, you must show that the left-hand limit and the right-hand limit approach the same value. This can be done by evaluating the function at the point in question and showing that as the x-values approach that point from both sides, the y-values approach the same value.

What does it mean for a limit to exist?

A limit exists for a function if the values of the function approach a specific value as the input values get closer and closer to a given point. This can be thought of as the "instantaneous" value of the function at that point.

How can I show that the limit is equal to 0?

To show that a limit is equal to 0, you must first evaluate the function at the point in question and then show that as the input values get closer and closer to that point, the output values approach 0. This can be done by using algebraic manipulations or by graphing the function.

Can I use a graph to show that both limits exist and are equal to 0?

Yes, a graph can be a useful tool to visually show that both limits exist and are equal to 0. By plotting the function and its behavior around the point in question, you can see if the left-hand and right-hand limits approach the same value of 0.

Is it possible for a function to have a limit of 0 but not exist at a certain point?

Yes, it is possible for a function to have a limit of 0 but not exist at a certain point. This can happen if the function has a vertical asymptote at that point, meaning that the function approaches infinity as the input values get closer to that point. In this case, the limit would still exist but the function would not be defined at that point.

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