Posted by **Anna** on Monday, December 13, 2010 at 10:31pm.

Hi Reiny, I posted this problem earlier and you responded but I don't get the reasoning-

The problem was -2log8(x+1) = -8

you said multiply by -2

and then you put log8(x+1)=4(wasn't that dividing by -2)

log8(x+1)^2 = 8 (how did you get to the power of 2 and =4 became =8

x+1 = 8^4

x= 4095

Thank you

- Algebra-Reiny please explain this -
**Reiny**, Monday, December 13, 2010 at 10:43pm
Of course I should have said divide by -2

I started by putting the 2 as an exponent, but then changed my mind.

I forgot to delete the line log8(x+1)^2 = 8 from that approach

here is the simple solution

-2log8(x+1) = -8

first of all, divide be -2

log8(x+1) = 4

(x+1) = 8^4 , by definition of logs

x+1 = 4096

x = 4095

- Algebra-Reiny please explain this -
**Anna**, Monday, December 13, 2010 at 10:46pm
Reiny, thank you-I get it now

thanks again

## Answer This Question

## Related Questions

- Math-Reiny - I posted this problem earlier and you answered it for me. The ...
- Algebra - How do I start to solve -2log8(x+1) = -8? I think -2log8(x+1) is log8...
- Reiny - Reiny I think I have found out the rectangle problem. Could you check ...
- Chemistry(Please check) - .50 - x / x = 3.20e-1 I need to solve for x. I was ...
- Chemistry - .50 - x / x = 3.20e-1 I need to solve for x. I was going to do .50 ...
- reiny - How do I find a variance for a set of numbers {1,16,8,17,12} I got that ...
- Algebra - I already posted this question and Reiny answered it, I just wanted ...
- Urgent math question for Reiny - Find the value of the expression below for r=4 ...
- algebra 1 - Reiny I posted a question earlier (about 3:00) and I have a question...
- math help - Thank you for helping me with the last problem Reiny and Bosnian. ...

More Related Questions