Question

Find the value of the integral from 2 to 6 of the natural log of x, dx using four rectangles of equal width, with each right end-point used to find the height of each rectangle.

Answer 1

https://www.khanacademy.org/math/integral-calculus/indefinite-definite-integrals/riemann-sums/v/simple-riemann-approximation-using-rectangles

Answer 2

i can prove it mathematically using integration by part but not with Riemann's approximation

Answer 3

thank you!