Question

Anyone fancy earning themselves a medal?

quick question...

what is ln7x=2ln9x

Answer 1

I don't! Can I still answer?

Answer 2

yes, go ahead (:

Answer 3

Is it \(\ln(7x)=2\ln(9x)?\)

Answer 4

yes

Answer 5

please give your answer to 3 d.p

Answer 6

Okay.
\[\ln(7x)-2\ln(9x)=0 \implies \ln\frac{7x}{(9x)^2}=0 \implies \frac{7}{81x}=1\]
\[\implies 81x=7 \implies x=\frac{7}{81}.\]

Answer 7

\[x=\frac{7}{81}\approx 0.086\]

Answer 8

thanks , shame you didn't want a medal!

Answer 9

Lol, you can give it though :P