## anonymous one year ago Math Question. Please explain how to solve this.

1. anonymous

$\sum_{n=0}^{4}\frac{ n ^{2} }{ 2 }$

2. anonymous

Expand and simplify this.

3. anonymous

ok it works like this $\sum_{n=0}^{4}\frac{ n^2 }{ 2 } = \frac{ 0^2 }{ 2 } + \frac{ 1^2 }{ 2 } +\frac{ 2^2 }{ 2 } +\frac{ 3^2 }{ 2 }+ \frac{ 4^2 }{ 2 }$

4. anonymous

|dw:1438274752520:dw|

5. anonymous

Am I suppose to add all of those together to get one number or would that be the final answer?

6. anonymous

yes

7. anonymous

It would be the final answer?

8. anonymous

thats why its called summation

9. anonymous

Oh so I have to add all of them.

10. anonymous

It equals 15?

11. anonymous

yea

12. anonymous

Okay thanks!

13. anonymous

yw