csolve + solve

[Kwee Tiow Choo]

See attached. can someone explain why? ty!

 

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[Joe]

The answer of course is -1, which is real, and apparently not complex
to ti's way of thinking thus csolve returns false. What results were
you expecting?

On Jan 31, 4:17 pm, Kwee Tiow Choo <kwe...@hci.edu.sg> wrote:
> See attached. can someone explain why? ty!
>

> [cid:image001....@01CCE0B9.E0CA55F0]

>
> P Think Green: Please consider the environment before printing this e-mail.
> NOTE: Privileged information may be contained in this message. If you are not the addressee indicated in this message, you may not copy or deliver it to anyone. Kindly notify the sender and destroy this message.
>

>  image001.png
> 33KViewDownload

[kwee]

csolve gives all solution regardless of complex or real, eg,
csolve(x^2=1,x) give x as 1 and -1. i expect csolve to give all ans.
that is why i am puzzled by teh output.

> > 33KViewDownload- Hide quoted text -
>
> - Show quoted text -

[Jim Fullerenex]

The reference guide has stated this problem. Apparently TI is well aware of the issue and chooses to deal with it by a warning on the manual.

2012/2/1 kwee <kwe...@hci.edu.sg>

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[Joe]

I see what you mean. Csolve gives real number answers sometimes but
not all the time. Wonderful, just wonderful, a warning in the
manual.