Re: RESTRICTING DOMAINS


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Re: RESTRICTING DOMAINS



Mark XIII (sulk@mail.idt.net) wrote:
: HI,


: DOES ANYONE KNOW HOW TO RESTRICT THE DOMAIN ON TI85. I HAVE TO GRAPH
: THREE FUNCTIONS


: Y=X^2 IF X<0
: Y=X^3 IF 0<X<1
: y=2X-1 IF 1<X


: I CAN RESTRICT THE FIRST AND THIRD DOMAINS BY TYPING:
: Y1=(X^2)/(X<0)
: Y2=..........
: Y3=(2X-1)/(1<X)


: WHEN I TRY TO ENTER THE FOLLOWIN LINE FOR Y2
: Y2=(X^3)/(0<X<1)
: I GET THE ENTIRE GRAPH OF X^3
: WHAT CAN I DO TO RESTRICT THE DOMAIN FOR THIS FUNCTION.  I COULDN'T FIND
: AN ANSWER IN THE MANUAL EITHER.




Try y2=(x^3)(x>0)(x<1).  The TI won't let you combine two comparisons as one.
In fact I believe it wil evaluate the double comparision as (0<x)<1 which is
true as long as x>0 since TRUE NOT= 1 and FALSE == 0
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|Shawn D'Alimonte       |Sec. Year Elec. Eng at Ryerson Polytechnic Univ. |
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