Hi i am trying to find the left and right and left Riemann sum on a ti 83. i have the program but my answer does not correlate with the calculator answer. does anyone know what the problem may be?

Question

Hi i am trying to find the left and right  and left Riemann sum on a ti 83. i have the program but my answer does not correlate with the calculator answer. does anyone know what the problem may be?

nowhereman · Answer

Which concrete problem are you calculating?

anonymous · Answer

im calculating for x^2+1 interval (0,3) with four rectangles  for the left sum i got 8.906 but my calculator says its zero which is wrong

anonymous · Answer

hi nath,what Rieman sum you are working on?

anonymous · Answer

hey mark  the question is above your response

nowhereman · Answer

I'm not quite familiar with that ti, what are you putting in there?

anonymous · Answer

for the y= i put in the  function then i went to program selected integral and inputed the information but  Im getting the wrong response

anonymous · Answer

ah ok, my pc keeps on hanging up thats why cant see them..lol

mathteacher1729 · Answer

Here you go: http://www.math.psu.edu/dlittle/java/calculus/area.html Enter any function you like, find the left, right, and center sums. You can specify how many subintervals you'd like and it graphs it all. BEAUTIFUL applet. :)

anonymous · Answer

ty but i want yto do it on my own calculator so i can check my answer

anonymous · Answer

did you add you L+R?

anonymous · Answer

where should i add it

anonymous · Answer

on you calculation in the paper you calculated

anonymous · Answer

my calculation is right bc i checked my answer with the back of the book. there something wrong with my calculator

anonymous · Answer

approx A= (LHS+RHS)/2

anonymous · Answer

oh ok..what is the answer from the book?

anonymous · Answer

what is you LHS and the RHS? so that i can relate with my calculator also, im using a casio scintific calc

anonymous · Answer

mine is a graphing calcultor  my left is 8.906  i didnt calculate my right

anonymous · Answer

calculate also your RHS

anonymous · Answer

my calculator directly computes for total Rieman sum, my calculator doesnt have a LEFT AND RIght sum

anonymous · Answer

ok nath i got the solution for you calculator now,,are you there

anonymous · Answer

use you calculator  compute your delta x=(3-0)/4= .75.  then on your calculator use the LHS Rieman sum= sigma (from 0 to 3)( (.75x)^2 +1) =11.875*.75=8.90625

anonymous · Answer

i will leave for you to solve for the RHS .......hope you get the idea nath