Moderate# When are Derivatives the Same?

APCALC-PFGBME

Which of the following are equivalent to $\cfrac{d}{dx} (3x^3)$?

**I**. $y'$ when $y=\cfrac{3}{2} \left( 2x^3-\cfrac{2}{3} \right)$

**II**. $\cfrac{dy}{dx}$ when $y-3x^3=15$

**III**. $f'(x)$ when $f(x)=(3x-2)^3$