# The fifth derivate of the function.

1. Jun 18, 2009

### Penultimate

Whats the fifth derivate of the function $$y=x lnx$$ ?
y(5)

2. Jun 18, 2009

### qntty

Show some work first and indicate where you got stuck.

3. Jun 18, 2009

### ideasrule

Not to sound too harsh, but if you can't even do a derivative as simple as xlnx, you won't do well on tomorrow's exam. Try reviewing:

(1) product rule
(2) quotient rule
(3) chain rule

Once you do so, the question you asked should be easy to solve.

4. Jun 19, 2009

### tiny-tim

Hi Penultimate!

It must mean the fifth derivative, ie the derivative of the fourth derivative, ie … d/dx( d/dx( d/dx( d/dx( d/dx(xlnx))))).

How far have you got?