Mathematics

The key is to recognize that the denominator has a special structure—it factors or relates to roots of unity in a way that lets you simplify the rational function before differentiating. Try polynomial long division or look for a factorization that reveals $y$ as a simpler polynomial rather than a true fraction. Once you reduce $y$ to a polynomial form, taking the derivative becomes straightforward, and you can read off the coefficients $a$ and $b$ directly.

The key is to recognize that the denominator has a special structure—it factors or relates to roots of unity in a way that lets you simplify the rational function before differentiating. Try polynomial long division or look for a factorization that reveals $y$ as a simpler polynomial rather than a true fraction. Once you reduce $y$ to a polynomial form, taking the derivative becomes straightforward, and you can read off the coefficients $a$ and $b$ directly.