CPM Homework Help : CALC Problem 4-104

Write a Riemann sum to approximate $\int _ { 0 } ^ { 2 } ( 6 ^ { x } ) d x$ using $n$ rectangles.

Hint:

General form of left-endpoint Riemann sum:
$\displaystyle\sum_{i=0}^{n}\Delta xf(a+\Delta xi)$