### Home > CALC > Chapter 3 > Lesson 3.3.3 > Problem 3-116

3-116.

For each function below, write and evaluate a Riemann sum to calculate

*A*(*f*, −2 ≤*x*≤ 1) using 24 left endpoint rectangles. Homework Help ✎*f*(*x*) = 2^{x}

General form of a left-endpoint Riemann sum:

where *a* and *b* are the starting and ending values and *n* is the number of rectangles.

Refer to the hints in part (a).