How to apply the definition of the derivative of a delta function

[rocky3321]

I am supposed to prove that δ'(ax) = (1/a)*(1/|a|)*δ'(x) but I cannot figure out where the (1/a) term comes from. Using the scaling theorem I know that δ(ax) = (1/|a|)*δ(x), but how does this apply to the first derivative and does it explain where the (1/a) comes from?

 

[rocky3321]

No need to post any further dialogue because I was able to figure it out. Thanks