Re: System of equations

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: System of equations
From: Ray Kremer <raykremer@HOTMAIL.COM>
Date: Tue, 27 Mar 2001 03:02:12 -0500
Reply-To: Ray Kremer <raykremer@HOTMAIL.COM>

Call me lazy, but with a For loop checking the results you wouldn't have to
manually inspect L3 for the 180.  Oh, and you can get away with
L1=seq(x,x,1,28)

For x,1,28
If lcm(x,56-x)=180
Then
Disp x
Disp 56-x
End
End

Tougher indeed.


>Ray. I'm surprised at you!  The list feature of the 83 makes this a simple
>problem.
>
>        L1       seq(x,x,1,55)
>        L2       56-L1
>        L3       lcm(L1,L2)
>
>Programming it would be tougher...
>
>Steve Muthler
>Jersey Shore (PA) HS
>>
>> Least common multiple doesn't really fit to any equation, so you would be
>> hard pressed to have the calc solve this right away.  I don't know if
it's
>> the best way but what I would do is set up a small program with a for
loop
>> that does a guess and check of all the possible values of a and b.
>>
>> >Can anyone  tell me how to solve this system of equation please:
>> >a+b=56 and lcm(a,b)=180 with a<b
>> >I couldn't solve this using my TI-89.
>> >I think that this type of equation can't be solved by the calculator.

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