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<P><FONT SIZE=2>Thank you Gerd! <BR>
<BR>
That worked well. I changed one of the lines to<BR>
if (&cas('maxima',"($left)-($b)-(y-$right)") eq '0') { return 'EXACT_ANS'; }<BR>
<BR>
Just in case someone decides to enter 8=y. =]<BR>
<BR>
<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: lon-capa-users-bounces@mail.lon-capa.org on behalf of Gerd Kortemeyer<BR>
Sent: Thu 1/19/2012 8:17 PM<BR>
To: Discussion list for LON-CAPA users<BR>
Subject: Re: [LON-CAPA-users] Having an equation or a range as a response<BR>
<BR>
Hi,<BR>
<BR>
On Jan 19, 2012, at 9:51 PM, Gerd Kortemeyer wrote:<BR>
><BR>
><BR>
> On Jan 19, 2012, at 8:39 PM, Seema Ali wrote:<BR>
><BR>
>> An example would be:<BR>
>><BR>
>> State the equation for the asymptote for the graph y=10^(x+7)+8.<BR>
>> Answer: [answer box]<BR>
>><BR>
><BR>
> So that would be x=7 or y=8, correct?<BR>
<BR>
Not sure anymore how I got to that x-solution, except that I just looked at the Google plot :-) In any case, I hope the sample code is useful, just eliminate the second solution.<BR>
<BR>
For more complex equations, you need to wrap the MAXIMA-code into trigsimp(trigreduce(.)), so MAXIMA bothers simplifying the expression beyond the basics. When I have more time, I'll make a nice template for an "equation problem."<BR>
<BR>
What else?<BR>
<BR>
- Gerd.<BR>
<BR>
<BR>
<BR>
<BR>
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