Riemann's sum program

[igotcrunk]

for the love of god can someone tell me how to input "TI-83 Program for (left) Riemann Sums"???

I have the lines and everything but am completelyn calculator inept so I cant even figure out how to put it in.

The lines Im supposed to enter are as follows:

0 -> S
Disp "USES FUNCTION Y subset 1"
Prompt A, B, N
(B-A)/N -> D
A -> X
For(I, 1, N)
S+Y subset 1 * D -> S
X+D -> X
END
Disp "RIEMANN SUM IS", S


WHAT DOES THIS MEAN???

by the way when i say Y subset 1, i mean as in the first value of Y in a function, and -> is just an arrow pointing right

 

[Gene]

This should be in the calculator section.

It appears you are using a package. At least I can't find anything about the subset instruction in the manual. What it seems to be saying is
Add each Y value times the box width to S and store it in S. That's what the -> means. The first line says store 0 in S.
If you have entered (in some not obvious to me way) the S+Y subset instruction it should work.
If not, you might look at
http://www.westmont.edu/~phunter/ma10h/ti83/sums.htm
for a way of doing it without that instruction.

PS. The instructions are hidden in various places. You start by pushing PRGM.
Select NEW
Name it
enter 0
enter STO->
enter S
ENTER
That takes care of the first line
Push PRGM
Select I/O
Select 3ISP
Type the comment.
ENTER
That's the second line.
Etc.