<p>I know this is off-topic, but... does anyone know a way to get the solve() function to return only solutions which are integers?</p>
<p>Maybe I would have to write a program/new function to do so... anyone know how I'd go about that? </p>
<p>are there any GOOD TI-basic89 tutorials that anyone knows of? I could only find bad ones.</p>
<p>thanks</p>
<p>Couldn't you just scroll through the answers the solve gives you and pick out the integers? (I'm probably being really dense, but it makes sense to me.)</p>
<p>Use the "factor" option instead of solve. You will only get integers and fractions. Of course, it will be in the form x-2 (for example) and you will just have to know that x=2.</p>
<p>I'm asking about this for situations where there would be an infinite number of solutions, but only a small number would be integers...</p>
<p>Hmm... can you give an example of that kind of equation?</p>
<p>Like..hmm.. pretty much I'm just trying to make my calculator more useful for math contests.. I recently had a question that asked:</p>
<p>_ _ % of _ _ _ = 400</p>
<p>fill in each box with a non-zero integer.</p>
<p>I used brute force, but something like I described earlier would have been very nice. </p>
<p>I also think it would be nice for SAT math, in some situations, but I'm not gonna go looking for examples right now.</p>
<p>There probably isn't an easy way, but I figured it was worth asking.</p>
<p>For these kinds of problems, it shouldn't be too hard to wrrite a program on the spot.</p>
<p>What I would do to find integer solutions: write a programs that prompts for a min and a max, and then check to see which integers in that range work.</p>
<p>Where can I find a good tutorial on BASIC for 89?</p>
<p>online at the ti-site? If you have the booklet that came with the calculator it will probably be in there as a chapter.</p>