Thread: Natural Log ?'s

1. if lnx+ln(x-6) = ln3x then x= ????

2. if ln(4x+2)=5 then x= ???

Hi

for the first one use the following properties :

ln(a)+ln(b)=ln(ab)
if ln(a)=ln(b) then a=b

So here x(x-6)=3x


For the second one, if ln(a)=b, then a=e^b (if it's natural logarithm)
-> 4x+2=e^5

Originally Posted by phil S

1. if lnx+ln(x-6) = ln3x then x= ????

now what? can you continue?

2. if ln(4x+2)=5 then x= ???

i think you can take it from here