Question

what's the derivative of (4x+9)?

Answer 1

4

Answer 2

okay so I tried using the quotient rule to find the derivative of (6x)/(4x+9) and I got the wrong answer. any help?

Answer 3

quotient rule

dy/dx = vdu - udv
-------- if y = u/v
v^2

y =6x / 4x+9

y' = (4x+9)* 6 - 6x * 4
----------------
(4x+9)^2

= 24x + 54 - 24x
------------
(4x+9)^2

= 54
---
(4x+9)^2

Answer 4

hahah alright thanks. that's what i got the first time i did it, but it didn't accept my answer because i factored out (4x+9)^2. so stupid.