Question

Differentiate the following function.

Answer 1

\[y=\cos x/x^5\]

Answer 2

not interested, sorry.

Answer 3

I tend to prefer to rewrite these kinds as a product with negative exponents.. Saves me having to bother with separate memory space for the 'quotient rule'

Answer 4

\(y = x^{-5}cos(x)\)
\[\implies\frac{dy}{dx} = x^{-5}\frac{d}{dx}[cos(x)] + cos(x)\frac{d}{dx}[x^{-5}]\] \(=\ ...\)