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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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Peter Percival

Posts: 1,215
Registered: 10/25/10
Re: Is (t^2-9)/(t-3) defined at t=3?
Posted: Sep 29, 2013 4:12 PM
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Hetware wrote:
.
>
> I would need a lot more in the way of formal development than a typical
> calculus book provides in order for me to be convinced of the error of
> first evaluating (t-x)/(t-x) symbolically and then evaluating it for an
> actual argument.
>
> If I were to write a computer program for processing functions defined
> in terms of algebraic expressions, I could write it so that it
> simplifies then evaluates, or I could write it so that it evaluates "as
> is".


How do you simplify (t-x)/(t-x)? It only simplifies to 1 when x=/=t.

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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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Hetware
9/28/13
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quasi
9/28/13
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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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Peter Percival
10/6/13
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Hetware
10/6/13
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Peter Percival
9/29/13
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Michael F. Stemper
9/29/13
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Hetware
9/29/13
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quasi
9/29/13
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Hetware
9/29/13
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magidin@math.berkeley.edu
10/6/13
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Hetware
10/6/13
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magidin@math.berkeley.edu
10/7/13
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Hetware
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LudovicoVan
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Peter Percival
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magidin@math.berkeley.edu
10/12/13
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Hetware
10/12/13
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fom
10/13/13
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magidin@math.berkeley.edu
10/13/13
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Richard Tobin
10/13/13
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Hetware
10/13/13
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Peter Percival
10/13/13
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fom
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magidin@math.berkeley.edu
10/13/13
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magidin@math.berkeley.edu
10/8/13
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quasi
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magidin@math.berkeley.edu
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quasi
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10/12/13
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Peter Percival
10/9/13
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magidin@math.berkeley.edu
10/9/13
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fom
10/10/13
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magidin@math.berkeley.edu
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fom
10/7/13
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Hetware
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fom
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Peter Percival
9/29/13
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quasi
9/30/13
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Peter Percival
9/30/13
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Peter Percival
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9/28/13
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Virgil
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Virgil
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Hetware
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LudovicoVan
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quasi
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10/6/13
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Hetware
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Peter Percival
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10/8/13
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10/9/13
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Peter Percival
10/10/13
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Ciekaw
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10/10/13
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10/13/13
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Hetware
10/13/13
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10/13/13
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Hetware
10/14/13
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Hetware
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Hetware
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10/14/13
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Hetware
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magidin@math.berkeley.edu
10/14/13
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Peter Percival
10/14/13
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Hetware
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10/16/13
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10/16/13
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quasi
10/19/13
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Hetware
10/19/13
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quasi
10/19/13
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Hetware
10/20/13
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fom
10/20/13
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quasi
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Hetware
10/20/13
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fom
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Hetware
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Peter Percival
10/20/13
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Richard Tobin
10/20/13
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Hetware
10/30/13
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@less@ndro
10/19/13
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Hetware
10/10/13
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Ronald Benedik
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
10/19/13
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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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Hetware
10/20/13
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quasi
10/20/13
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quasi
10/20/13
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Hetware
10/20/13
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Peter Percival
10/20/13
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magidin@math.berkeley.edu
10/20/13
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Hetware
10/20/13
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Arturo Magidin
10/20/13
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Hetware
10/20/13
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magidin@math.berkeley.edu
10/19/13
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fom

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