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

For the function f(x)=10-4(x^2), find a formula for the lower sum obtained by dividing the interval [0,1] into n equal subintervals. Then take the limit as n->infinity to calculate the area under the curve over [0,1].

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.

## Answer This Question

## Related Questions

- Calculus - Using f(x), determine a formula for the Riemann Sum S_n obtained by ...
- Calculus - These are the two problems from my homework I don't get.. can you ...
- business calculus - Approximate the area under each curve over the specified ...
- business calculus - Approximate the area under each curve by evaluating te ...
- AP Stats - I generally know how to use the normalcdf function on my calculator, ...
- calculas 1 - Use upper and lower sums to approximate the area of the region ...
- Calc - (1/1+(4/n))(4/n)+(1/1+(8/n))(4/n)+(1/1+(12/n))(4/n)+....+(1/1+(4n/n))(4/n...
- calculus - consider the function f(x)= x^2/4 -6 Rn is the Riemann sum where the ...
- calc help - consider the function f(x)= x^2/4 -6 Rn is the Riemann sum where the...
- calculus - Recall that a function G(x) has the limit L as x tends to infinity, ...

More Related Questions