# Economics differentiation question

Printable View

• Oct 6th 2012, 08:25 AM
entrepreneurforum.co.uk
Economics differentiation question
Can somebody walk me through this answer

I have these:

$w = ∂F(K, AL) / ∂L$ and $r = ∂F(K, AL) / ∂K$.

Where $K = K/AL$

I have the answer $A[ f (k) - kf '(k)]$ but confused on the steps to prove it

Thanks
• Oct 6th 2012, 09:12 AM
SpringFan25
Re: Economics differentiation question
define all terms and tell us what the question wants you to do first !
• Oct 6th 2012, 09:23 AM
entrepreneurforum.co.uk
Re: Economics differentiation question
$A = Technology$
$l = Labour$
$K = Capital$

$w = Marginal product of labour$
$R = Marginal product of capital$

I've got to show the MPL is the function provided above (the answer)