Question

inverse of:
f(x) = ln(2x)-3
:S

Answer 1

well here again, switch the x and y's
think of f(x) = y b.t.w.

x=ln(2y)-3
x+3=ln(2y)
e^(ln2y)=e^(x+3)
2y=e^(x+3)
y=(1/2)e^(x+3)
..
and that is your inverse

Answer 2

I get through till your third step.

Answer 3

see that again, is just a rule..
it will be in your text book

so remember this.. forever! e^(lnx) = x

Answer 4

because you can't just divide by an ln. it doesn't work like that