<p>i lost my TI-83+ and am going to buy a new one on ebay. However, I am unsure whether to by an 83+ model or an 89 model. I heard that the 89 is more useful on tests and in calculus, but that some universities do not allow it</p>
<p>please advise</p>
<p>I love my TI-89. If I had the choice, I would buy the TI-89. I have not heard of 1 university who has not accepted it. If you know any..please tell me.</p>
<p>I've also heard that many schools don't allow the 89 on tests. I've also heard of some that don't allow any.</p>
<p>I lost my 83+ too, and bought an 89. 3 days after I bought the 89, the kid who'd accidentally walked off with my 83 returned it. So now I have both, and I use them both (at the same time....talk about looking like a math dork). I use the 83 for number crunching and matrices and stuff, because it's easier to use than the 89. I use the 89 for Stats work (less to remember), and more complicated stuff that only the 89 will do.</p>
<p>lol.. same here except I have an 84+ and an 89.</p>
<p>I use the 84+ for physics, and easy stuff but I whip out the 89 when the hardcore calculus starts.</p>