Year 12s: what will be the first way you research your future options? >>

Exponentials help

username1533709

I'm.stuck on question 11.Could someone explain what I'm doing wrong?

Reply 1

username1533709

Posted from TSR Mobile

1436989240751.jpg22.1KB

1436989248386.jpg32.4KB

Reply 2

username1533709

Original post by Homletmoo

The third line doesn't make much sense: you need to get rid of that log, so you need to exponentiate both sides, rather than take more logs. I'm not sure how you got to

\mathrm{ln}\;e(\frac{x}4)

.

Remember that

e^{\mathrm{ln}(\frac{x}4)} = \frac{x}4

Posted from TSR Mobile

OK so I took the natural log of bothbsides to get rid of the log,but I still get the wrong answer!

Reply 3

username1533709

Original post by Homletmoo

The third line doesn't make much sense: you need to get rid of that log, so you need to exponentiate both sides, rather than take more logs. I'm not sure how you got to