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December 18, 2014

December 18, 2014

Posted by **Jenna** on Tuesday, May 5, 2009 at 9:54pm.

I only need help with the first part. I don't really understand how to find the formula for the lower sum.

i wrote down in my notes that a=w*h

w= (upper limit-lower limit)/n

h= (i*w)^2

and a= h[(n(n+1)(2n+1))/6]

but I don't really understand what "i" stands for, so I don't know how to use the formula.

- Calculus -
**Daniel**, Wednesday, April 21, 2010 at 1:52amYA i can't fingure out how to use it either im thinking that it could be the xi = a+x(change of x)

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