deletions | additions       diff --git a/P1.tex b/P1.tex  index 2fe29ee..2a5584a 100644  --- a/P1.tex  +++ b/P1.tex 
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$f(n) = O(g)$  \item  $f(n)=\sum_{k=1}^{n} k, g(n)=(n+2)^2$  $f(n) = \frac{k(k+1)}{2}$ via summation formula   $g(n)=(n+2)^2$     $f=\theta(g)$  \end{enumerate}