The Riemann sum utitlity class has four methods. One for each method of calculating a riemann sum: Riemann.rightSum(), Riemann.leftSum(), Riemann.midpointSum(), Riemann.trapezoidSum(). Each method ...

exercise from p.78 of 'Eloquent JavaScript' ... Next, write a sum function that takes an array of numbers and returns the sum of these numbers... As a bonus assignment, modify your range function to ...