### Home > PC > Chapter 2 > Lesson 2.3.1 > Problem2-71

2-71.

Explain how to modify the program SUM to evaluate $\displaystyle \sum _ { x = 7 } ^ { 16 } x ( x + 1 )$, then make the necessary modifications and use the program to find the sum.

The equation needs to be entered and the starting and ending values need to be adjusted. $\text{SUM}=1520$