Ti-86, ROM 1.3: BUG with function of function!?
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Ti-86, ROM 1.3: BUG with function of function!?
Hello everyone!
I think I've found a bug whith the TI-86, ROM version 1.3. This was what I
did when I found it (or see the PS):
First I entered these two functions (sqrt=square root):
y1=sqrt(1-x^2)/x
y2=y1(x)/x
And then I graphed y2 -- ok so far. But if I try to trace, or do anything
under the MATH-menu it gets weird.
If I trace it shows:
x=0 y=
-- just as it should do, but when i move the cursor it doesn't follow the
graph.
If I, for example, try to integrate it it doesn't ask for a lower limit or
anything.
The problem seems to be that the function is not defined for x=0; if I
change the windows-settings so that the cursor doesn't start at x=0 it goes
well, until I try to e.g. trace to x=0.
The bug does NOT occure if only y1=(sqrt(1/x^2)/x)/x is entered! (I.e. the
same thing, but written as one function.)
Is somebody able to recreate this bug? Is it already known, or does it
exist in more recent ROM-versions? Or is it only my calculator that is weird?
Thanks,
Johan Winge
PS:
To be more specific I pressed these keys, (after full reset):
GRAPH F1 2nd X^2 ( 1 - x-VAR X^2 ) / x-VAR F5
ENTER 2nd ALPHA 0 1 ( x-VAR ) / x-VAR ENTER EXIT F5
and then e.g.
F4 ->
or
MORE F1 F3
--
``The only true fool is the man who
repeatedly quotes foolish sayings.''
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