Question 963606

 {{{f(x) = ln(3x)}}}

The domain is all the values a variable can take on without causing an invalid function.

In this case, if {{{x=0}}} then what's inside the parentheses is {{{0}}}, which you can't take the log of. So the domain is {{{x >0}}}. 

domain:

{ {{{x}}} element {{{R}}} : {{{x>0}}} }  (all positive real numbers)


{{{ graph( 600, 600, -10, 10, -10, 10, ln(3x)) }}}