L'Hopital Rule - Limits

  • Thread starter planauts
  • Start date
  • #1
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Homework Statement


http://puu.sh/1irk2 [Broken]


Homework Equations





The Attempt at a Solution


I am having trouble doing this question. I tried doing the L'Hopital but didn't work. When I subbed in 0 in the function, I got 0/0.

first time:
I got that: http://puu.sh/1iroz [Broken]

It still gave me the indeterminate form (0/0). Could someone give me a hint on solving this limit, I know the answer is 0 (used wolframalpha) but I am unsure why it is.

Thanks
 
Last edited by a moderator:

Answers and Replies

  • #2
lurflurf
Homework Helper
2,440
138
Use L'Hopital's rulke again on the new limit.
 
  • #3
Dick
Science Advisor
Homework Helper
26,260
619

Homework Statement


http://puu.sh/1irk2 [Broken]


Homework Equations





The Attempt at a Solution


I am having trouble doing this question. I tried doing the L'Hopital but didn't work. When I subbed in 0 in the function, I got 0/0.

first time:
I got that: http://puu.sh/1iroz [Broken]

It still gave me the indeterminate form (0/0). Could someone give me a hint on solving this limit, I know the answer is 0 (used wolframalpha) but I am unsure why it is.

Thanks

Use algebra to simplify your answer. I don't think the limit is zero.
 
Last edited by a moderator:
  • #4
FOIWATER
Gold Member
434
12
I also did not get zero

I would not suggest using L'hospital's rule again, it can be simplified to give you a limit which is not zero I believe
 
  • #5
86
0
Nevermind, you are right. It is -1. I redid it, when I simplified it, all the x's that led to the evil division of zero disappeared.

Thanks
 

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