### Home > PC3 > Chapter 3 > Lesson 3.2.3 > Problem3-123

3-123.

Write the following expression using summation notation.

$0.25(3)^2+0.25(3.25)^2+0.25(3.5)^2+\ ...\ +0.25(5.5)^2+0.25(5.75)^2$

How many terms are being added? Start your index at $1$. Stop at the last term. (Alternatively, you could start at $0$ and end at $9$.)