Question

Hi. I need help wih this question (see image). Please show workings.
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Answer 1

`(dy)/(dx)` = 12x³ - 6x² - 7

Explanation:

Differentiate each term using the power rule

`(d)/(dx)` (a
`x^(n)` ) = na
`x^(n-1)`

Given

y = 3
`x^(4)` - 2x³ - 7x + 5, then

`(dy)/(dx)` = 4.3
`x^(4-1)` - 3.2
`x^(3-1)` - 7
`x^(1-1)` + 0

= 12x³ - 6x² - 7