Let y = \(\cfrac{(\text x^2-1)^3(2\text x-1)}{\sqrt{(\text x-3)(4\text x-1)}}\)
Take log both sides:
Differentiating with respect to x:
\(\Bigg\{\) Using chain rule, \(\cfrac{d(u +a)}{d\text x}=\cfrac{du}{d\text x}+\cfrac{da}{d\text x}\) where a and u are any variables \(\Bigg\}\)