<p>Today in AP Calc AB, we learned about using the grapher to calculate the rectangles' areas under the curve with numbers that would take long to do by hand. The funny thing is, the program we are using usually still takes a while for the TI-83 to draw the rectangles and then display what the LRAM, MRAM and RRAM values are. If we could cut out the graphing part and retain the pure calculating part, that would be great and hopefully save time/energy.</p>
<p>Does anyone know of the graph*less* program that will just provide the values and not the images? This could be an important program to have during a test where time is strapped to begin with. I tried looking for it online, but all I could seem to find was the actual program itself, and not the code/"text" of it (I haven't taken any computer science classes yet, so I am not program savvy, but I am interested in the subject and would like to learn about it).</p>
<p>After a while, LRAM, MRAM, RRAM just...merge into integrals. Getting those values are evil, but take the integral. On the ti83 I think you go to math, scroll down to fnint, and plug in like so: fnint([function, like x^2, for example], x, [lower limit #], [upper limit #]) and press enter. That will give you the integral value, but NOT L/M/RRAM values.</p>
<p>Or you could use the fundamental theorem of calculus!</p>
<p>Thank you, Calculus BC...too bad it goes so fast for me. >_<</p>
<p>haha, do you know about the integrate function on your calculator (supposing u have a TI-89 or something similar)? Does basically the same thing, only 100% accurate. Its 2nd-F7..give it a shot.</p>
<p>My teacher let me take home the "technology resource manual for calculus" (1994, from Addison Wesley)...designed for TI-82 graphers and earlier. Turns out it had just the program I was looking for. For anyone who may be in the same problem that I was, here is the program, typed out...</p>
<p>:Disp "A="
:Input A
:Disp "B="
:Input B
:Disp "NO. SUBINT="
:Input N
:(B-A)/N->H
:H/2->D
:A->X
:0->L
:0->M
:0->R
:Lbl 1
:Y1+L->L
:X+D->X
:Y1+R->R
:If B-X>.001
:Goto 1
:HL->L
:HM->M
:HR->R
:Displ "LEFT="
:Disp L
:Disp "MID="
:Disp M
:Disp "RIGHT="
:Disp R</p>