Math Refreshers

Derivation of polynomials

The general formula for polynomial derivation is given by:

\frac{d}{dx}\sum_{i=0}^n a_ix^i = \sum_{i=1}^n ia_ix^{i-1}

where\ ai_ are\ the\ coefficients\ of\ the\ polynomial.

Now if you see a variable in a denominator, you may bring it to the numerator by negating its exponent:

\frac{1}{x^n}=x^{-n}