summing - Riemann sums

[Sarahisme]

hey is this right?

 

i thought only the sum of just i = n(n+1)/2

 

??

[Sarahisme]

and if not i am not quite sure how to do the riemann sums of f(x) = 1 - .5x, [0,1]

 

using Li=x(i)

and

Ui = x(i-1)

note stuff in brackets is meant to be subscipt

[Sarahisme]

lol actually nevermind, i figured it out,

 

sorry about that guys and gals

[mezarashi]

lol, congratulations. One best rely on one's self, or so they say.

[fuhrerkeebs]

Yeah, when your summing things that are added together like that it is easier to split the sum in two.