### Home > PC3 > Chapter 5 > Lesson 5.1.1 > Problem5-6

5-6.

​Write out the sum and calculate: $\displaystyle \sum _ { k = 2 } ^ { 6 } ( k - 2 ) ^ { 2 }$

Start with $k=2$, then $k=3$, $4$, $5$, $6$.