Let f(x) =2x over the interval [1 , 2]. Find a formula for the Riemann sum obtained by dividing the interval 1 , 2 into n equal sub- intervals and using the right endpoint for each Ck . Then, take a limit of these sums as n - co to calculate the true area under the graph of f over [1 , 2] . Show and explain your work. Upload Choose a File