Hello Community. I could use some help on these calculus problems (Derivitiv). Thanks

[giants1080]

1.differentiate the function using the quotient rule.
fx=cos(5x)/x^4
2.fx=(x+3)/(x-2). Derivitive?
3.
Derivitive?
4.
derivitive?
5.

derivitive

6.Find the second derivative of the function.

f(x) = 2x + 25x−2

7.Find f '''(x).

[artvandalay11]

it seems as though you're stuck with the quotient rule, how about you try one and I'll see where you're having problems and try to help you

[giants1080]

ok thank you. I have tried all of them and got wrong answers. I will try number 2.
fx= (x+3)/(x+2)
=x+2-x-3/x^2+4x+4
=-1/x^2+4x+4??

[artvandalay11]

ok thank you. I have tried all of them and got wrong answers. I will try number 2.
fx= (x+3)/(x+2)
=x+2-x-3/x^2+4x+4
=-1/x^2+4x+4??

So i think you want the deriv of f(x)





and simplify from there

Notice that the first '1' is the deriv of the numerator and the second '1' is the deriv of the denominator