Posted by **Kong** on Saturday, November 12, 2011 at 10:30pm.

solve it:

a) 3 log x with base 8 + 2 = 0

b)2 log (x-1)with base 6 =log 4 with base 6

- Maths(logarithmic functions) -
**Reiny**, Sunday, November 13, 2011 at 1:12am
a)

3 log_{8} x = -2

log_{8} x = -2/3

8^(-2/3) = x

x = 1/4

b) 2 log_{6} (x-1) = log_{6} 4

log_{6} (x-1)^2 = log_{6} 4

(x-1)^2 = 4

x-1 = ±2

x = 3 or x = -1 , but for log(x-1) to be defined, x>1

so x = 3

## Answer This Question

## Related Questions

- Advanced Functions/ Precalculus Log - 1. Evaluate 4^(log base4 64) + 10^(log100...
- Algebra 2 - -Explain the difference between log base b (mn) and ( log base b of ...
- check! - here is the question: log5(x-4)= log7x solve for x. These are just base...
- Trig - log base b 64 - log base b 16 = log base 4 16 solve for the variable.. i...
- precalc - Solve: round to the thousandths if necessary! 1) 4^3/4x+5 = 12 2) log(...
- Precalc - 1. 1/3log base 8 of (x+1)=2log base 8 of 3-(2/3)log base 8 of (x+1) 2...
- Math - Help with these problems would be greatly appreciated: 1.Find the ...
- math(Please help) - 1) use the properties of logarithms to simplify the ...
- math - Use the Laws of logarithms to rewrite the expression log(base 2)(11x(x-9...
- Algebra - In the logarithmic expression . . . log(base 4) 8 , how does the base ...

More Related Questions