I solved this problem and couldn't get the last step but apparently it went like this. First e^-x=8

Then ln(8)=-x

So x=-ln(8)

Apparently the answer is then x=ln(1/8)

I just don't know why the negative ln8 is equal to 1/8.

Printable View

- January 11th 2010, 01:56 PMBugzLooneyWhy is -ln8 equal ln1/8?
I solved this problem and couldn't get the last step but apparently it went like this. First e^-x=8

Then ln(8)=-x

So x=-ln(8)

Apparently the answer is then x=ln(1/8)

I just don't know why the negative ln8 is equal to 1/8. - January 11th 2010, 02:02 PMpickslides

All good? - January 11th 2010, 02:05 PMpomp
- January 11th 2010, 02:05 PMDrexel28
- January 11th 2010, 02:16 PMe^(i*pi)
Of course neither nor are fully simplified (Wink)

(Giggle) - January 11th 2010, 02:23 PMbigwave
why would you say that is simplified??

it doesn't look any like any reduced form?

just being cranky. - January 11th 2010, 03:06 PMBugzLooney
Woah how does ln(1/8) simplify to 3ln(2) and so forth?

- January 11th 2010, 03:08 PMDrexel28
- January 11th 2010, 03:24 PMBugzLooney
I understand everything except for the last post as it relates to mine.

ln(1/8) simplifies to 3ln(2) by that rule? I just don't see it. Though the explanations have been great thus far. - January 11th 2010, 03:33 PMDrexel28
- January 12th 2010, 05:45 AMHallsofIvy