### Home > CALC > Chapter 3 > Lesson 3.4.4 > Problem 3-186

3-186.

Write a Riemann sum to estimate for

*left endpoint (or other) rectangles. Then calculate the area for*

*,*

Refer to hints in problem 3-177 for further guidance about computing a left-endpoint Riemann sum.

Without a calculator, it is more time consuming to compute a sum with