### Home > CALC > Chapter 2 > Lesson 2.1.2 > Problem2-22

2-22.

Rewrite the sigma expression $\displaystyle\sum _ { i = 6 } ^ { 11 } f ( i )$ so that the index goes from $i = 10$ to $i = 15$.

If we are going to shift the index $4$ units to the right, we also want to shift the argument $4$ units to the right.