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Originally Posted by vinaur
Jesus Christ that's confusing. So how do you do like more complicated functions, like (((5+3)/8+5/3)/2)^2? Can you somehow type it all in at the same time, or do you have to do them one step at a time?
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I have a HP48GX, replaced my TI81 and have used it since my junior year in high school until now. I've used it for anything up to calc 4, and a bunch of CSci/Math courses for programming. The only complaint I have is that it is kind of slow on graphing and menu refresh.
Though it can get a little difficult to program in RPN, something like you suggest above is relatively simple if you are used to RPN: 5 <enter> 3 + 8 / 5 <enter> 3 / + 2 / 2 ^ (15 keystrokes compared to 19), plus you can see the results at each intermediate step, so you "know" if something is wrong right away. The stack based features are also nice -- it is easy to duplicate an answer for use in mutliple calculations, swap values, keep a running list of answers, etc.
It really isn't that hard, but it is fun to see other people try to use your calculator.