# Limit Process Summation Confusion

1. Jul 21, 2011

### Whalstib

Hi,

I have been staring at this for a while. I under stand the process and can account for and reproduce every step of this problem EXCEPT I can nit figure out where the 6i/n coms from. I have included the equation and the issue is highlighted in yellow.

Please explain... this is the last piece of the puzzle.

Thanks,

Warren

#### Attached Files:

• ###### 61.jpg
File size:
28.8 KB
Views:
66
2. Jul 21, 2011

### micromass

uuuuhm, $(a+b)^2=a^2+2ab+b^2$????

3. Jul 21, 2011

### Whalstib

Man!!!!!!! I am actually getting the calculus but completely blowing the algebra!

Thanks.....sigh.....

Warren