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Topic: Is (t^2-9)/(t-3) defined at t=3?
Replies: 166   Last Post: Oct 30, 2013 9:41 AM

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Hetware

Posts: 148
Registered: 4/13/13
Re: Is (t^2-9)/(t-3) defined at t=3?
Posted: Oct 6, 2013 11:34 PM
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On 9/30/2013 4:03 AM, Robin Chapman wrote:
> On 30/09/2013 07:58, Ciekaw wrote:
>> On Saturday, September 28, 2013 6:30:42 PM UTC+2, Hetware wrote:
>> >
>>> But F(t) is not defined at t=3 because it evaluates to 0/0.
>>>

>>
>> Hint L'Hôpital's rule
>>
>> f(t)=t-3
>> f'(t)=1
>>
>> lim[f(t)/f(t)]=lim[f'(t)/f'(t)]=lim[1/1]=1
>>
>>
>> Analogy:
>> If x=0 then sin(x)/x = 1

>
> Hetware: 0/0 = 3
>
> Ciekaw: 0/0 = 1
>
> Any more entrants?
>


To be correct; Hetware: 0/0 = 1 (under certain circumstances). But I've
already figured out what was perplexing me.


Date Subject Author
9/28/13
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Hetware
9/28/13
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Michael F. Stemper
9/28/13
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quasi
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Hetware
9/28/13
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quasi
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Peter Percival
9/29/13
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quasi
9/28/13
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Hetware
9/28/13
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Richard Tobin
9/28/13
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Hetware
9/28/13
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tommyrjensen@gmail.com
9/29/13
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Hetware
10/6/13
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Hetware
10/6/13
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10/6/13
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10/6/13
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10/7/13
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9/29/13
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9/29/13
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Hetware
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magidin@math.berkeley.edu
10/6/13
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Hetware
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10/7/13
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Hetware
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LudovicoVan
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10/12/13
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10/12/13
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fom
10/13/13
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10/13/13
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fom
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9/30/13
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10/13/13
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10/14/13
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10/16/13
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10/16/13
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10/19/13
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10/19/13
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10/19/13
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Hetware
10/20/13
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quasi
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Hetware
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Peter Percival
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10/30/13
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10/19/13
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10/10/13
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Peter Percival
10/10/13
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Virgil
10/18/13
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Hetware
10/19/13
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Peter Percival
10/19/13
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fom
10/19/13
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Peter Percival
10/19/13
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Hetware
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Peter Percival
10/19/13
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Hetware
10/19/13
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fom
10/19/13
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magidin@math.berkeley.edu
10/19/13
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Hetware
10/19/13
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magidin@math.berkeley.edu
10/20/13
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quasi
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Hetware
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10/20/13
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10/20/13
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