Question

Find the derivative
f(x)=3x^4-9x^3+5

Answer 1

hint: use the power rule

if y = x^n, then y ' = n*x^(n-1)

Answer 2

yeah thats what i was thinking which would make it
=12x^3-27x^2
but do I also use the product rule?

Answer 3

no need for the product rule since you don't have a product of two variable terms

Answer 4

what you have is the correct final answer

Answer 5

thats it?? nothing else to do? and you drop the constant since its derivative is zero right?

Answer 6

you are correct, the derivative of a constant function is 0

Answer 7

and yes, nothing else can be done

Answer 8

ok guess i am trying to make this harder than it is

Thanks

Answer 9

you're welcome