Obersumme

f(x) = x^(2) + 1
a = 0 (slider from -25 to 25, step 0.2)
b = 3.6 (slider from -25 to 25, step 0.2)
n = 8 (slider from 1 to 100, step 1)
c = LowerSum(f, a, b, n)
d = UpperSum(f, a, b, n)
Text1 = LaTeX(f, true, true)
Text2 = LaTeX(d, true, true)