1. The problem statement, all variables and given/known data FIND THE LOWER SUM FOR THE REGION BOUNDED BY f(x) = 25 - x^2 AND THE X - AXIS BETWEEN x = 0 and x = 5. SOLVE ANALYTICALLY!! 2. Relevant equations None that I'm aware of... 3. The attempt at a solution f(x) = -x2 + 25 and [tex]\Delta[/tex]X = b-a/n = 5-0/n = 5/n Here's my question: how do I find the left endpoints in order to solve for the lower sum?