In need of RAM programs

Test Preparation AP Test Preparation
1

<p>Does anyone know where I can find programs for LRAM, MRAM, and RRAM that can be typed into a TI-83+ calculator.</p>

2

<p>Here’s one i just typed up:</p>

<p>Input “Y1=”,Str1
Input “LOWER BOUND:”,A
Input “UPPER BOUND:”,B
Input “NUM SUBINTERVALS:”,N
DelVar L
DelVar R
For(X,A,B,(B-A)/N
expr(Str1)*(B-A)/N->S
L+(X<b)s->L
R+(X>A)S->R
End
Disp “LRAM”,L,“RRAM”,R,“MRAM”,.5(L+R)</b)s-></p>

<hr>

<p>-> is the STO key above On
If you can’t find most of the things I wrote, just look in the catalog.
Str1 can be found in [Vars]-[7]-[1]
If you actually want an explanation of what I wrote, just ask lol</p>

3

<p>There seems to be something wrong with the MRAM response on that program. It doesn’t match what I get by hand for certain problems with small intervals.</p>

4

<p>My bad…
Try deleting the last line, and replacing it with this.</p>

<p>DelVar M
For(X,A,B,(B-A)/N
X+(B-A)/(2N)->X
expr(Str1)*(B-A)/N->S
X-(B-A)/(2N)->X
M+(X<b)s->M
End
Disp “LRAM”,L,“RRAM”,R,“MRAM”,M</b)s-></p>

5

<p>Thanks. The program appears to work fine now.</p>