# How do you use the properties of summation to evaluate the sum of #Sigma (i^2-1)# from i=1 to 10?

##### 1 Answer

Oct 31, 2016

#### Explanation:

We could just add up the 10 terms but the numbers get a bit horrific, so it is actually easier in this case to derive a general formula standard formula for

So with n=10 we have: