ima solve al none negative solution för this equation ehmm idk how to write it but its ^(4) *logx*^(8)*log x = ^(16)*log x idk how to solve this

Results 1 to 5 of 5

- Nov 15th 2012, 09:21 AM #1

- Joined
- Sep 2012
- From
- Sweden
- Posts
- 250
- Thanks
- 6

- Nov 15th 2012, 01:21 PM #2

- Joined
- Apr 2005
- Posts
- 19,414
- Thanks
- 2889

## Re: log

I'm not sure what the "^4" means but I will guess that it is the base of the logarithm. I am used to that being written as a

**sub**script,**after**. If that is correct then the equation is .

Now, " " is the same as " ". Do you notice that all of those bases are powers of 2? , and . So is the same as and so , thus . , so , thus and . Similarly, so the equation can be written

If we let that is the same as .

Can you solve that?

- Nov 15th 2012, 01:25 PM #3

- Nov 15th 2012, 01:27 PM #4

- Joined
- Sep 2012
- From
- Sweden
- Posts
- 250
- Thanks
- 6

- Nov 15th 2012, 01:45 PM #5