<p>are there any programs out there that given a sequence, will write out the summation notation formula for you?</p>
<p>thx</p>
<p>LaTeX can write summations. So can the TI-89. Frankly, I am not sure of what you are asking. Do you just need something to right out the sigma stuff?</p>
<p>yes, given a sequence like -2+5+14+25+38+53. I want the calc to write out the equation for me. is that possible?</p>
<p>It might be possible; however, I do not of any programs that would do this.</p>
<p>I do not believe the TI89 nor Latex can do what he's asking averagemathgeek -- he needs some program or something.</p>
<p>On the TI89 (or any TI, I think), you can plot points and find the best-fit graph... maybe you could determine the equation that way?</p>
<p>I advised LaTeX because I thought he needed something to make the sigma signal and other stuff.</p>
<p>I did a casual and brief study of deriving the forumla given a sequence. It is fairly simple and I think a computer could do it. However, my method only works with sequences that fit a polynomial form, like the one you gave.</p>
<p>i know how to find the sequence, given that its polynomial (meaning that its differences could be brought down to a constant), by looking at numbers which increase from left to right.</p>
<p>is there even such a thing as writing out recursive sequence in sigma notation?</p>
<p>For the sequence -2,5,14,25,38,53
Let b1 = -2
bn = (bn-1) + 7 + 2i</p>
<p>If the teacher asks to write out -2,5,14,25,38,53 in sigma notation, is this even acceptable?
b1 + sigma (4 on top) (0 on the bottom) ( bn + 7 + 2i)</p>
<p>How else could I have done it?</p>
<p>Thanks</p>