Question

Hi. I need help wih this question (see image). Please show workings.​

Answer 1

Answer:

$\frac{dy}{dx}$ = 12x³ - 6x² - 7

Step-by-step explanation:

Differentiate each term using the power rule

$\frac{d}{dx}$ (a$x^{n}$ ) = na$x^{n-1}$

Given

y = 3$x^{4}$ - 2x³ - 7x + 5, then

$\frac{dy}{dx}$ = 4.3$x^{4-1}$ - 3.2$x^{3-1}$ - 7$x^{1-1}$ + 0

   = 12x³ - 6x² - 7