Thread:Sanitiy/@comment-11218751-20160203175055/@comment-11218751-20160204094943

Sanitiy wrote: The first formula is exactly the same as the second. All I did was factorizing it and replacing the fractions with decimal presentations. You can convert both equations into each other.

Hey Sanitiy,

The first formula you simplified is actually missing something very crucial. In case you haven't learnt algebra,

$$ (n^2-1) / (n-1)=(n^2-1^2) / (n-1) = (n-1) (n+1) / (n-1) = n+1 $$

Therefore, you are not entirely wrong in the first formula, but putting $$n$$ instead of $$n+1$$ at the end is not correct. Also, whilst I appreciate the simplicity of the formula, I just do not think this is the way to display it. Omitting the $$$$, which is here to highlight the most important formulas in the entire page does not seem right.

All in all, I really think you should consult an administrator before making significant (yet optional) changes like this.