I'm figuring out a worst case analysis on a function. After converting it to a set of summations, and changing the sigma notations into summation formuale I ended up with:
N(N+1)(2N+1) / 6 + N - N(N+1) / 2
Using LCD i was able to combine the first two components as:
N(N+1)(2N+1) + 6N / 6
Leaving me with:
N(N+1)(2N+1) + 6N / 6 - N(N+1) / 2
Using LCD again, I'm guessing I would use an LCD of 6 then combine the two fractions as i did the first. But i am having trouble converting the top line of the second fraction. Do I multiply the whole expression by 3, or just numerics?