Re: y1(value) on TI-85

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: y1(value) on TI-85
From: Daniel Reed <djr@NARNIA.N.ML.ORG>
Date: Sun, 5 Oct 1997 10:30:50 -0400
Comments: To: Roland Bengtsson <roland.bengtsson@MBOX3.SWIPNET.SE>
In-Reply-To: <323.7216T915T2685@mbox3.swipnet.se>
Reply-To: Daniel Reed <djr@NARNIA.N.ML.ORG>

On Sat, 4 Oct 1997, Roland Bengtsson wrote:
) If i define a function say y1=x^2 i graphs fine.
) if I write y1(5) in the commandline shouldn't it display 25?
)
) It displays 1.953125  .....
y = f(x) when thinking mathematically, and with graphing calculators...
you are defining y, aka f(x), to be x^2
However, if you were to try to perform a function of y, that would erm be
the anti function of f (I think--it doesn't technically have to be a
function at all so I'm not quite sure).
What you want to do is

y1=x^2
                 Done
Eval 5
                 {25}

or, alternately

y1=x^2
                 Done
5->x
                    5
y1
                   25

--
Daniel Reed <n@narnia.n.ml.org>
System administrator of narnia.n.ml.org (narnia.mhv.net [199.0.0.118])
Psychic midget escapes prison--SMALL MEDIUM AT LARGE!

References:

y1(value) on TI-85

From: Roland Bengtsson <roland.bengtsson@MBOX3.SWIPNET.SE>