Sunday

February 1, 2015

February 1, 2015

Posted by **Anonymous** on Tuesday, May 18, 2010 at 5:21pm.

Log (9x+5) - Log ((x^2)-1) = 1/2

16 16

(The 16 is from the logarithmic function : b) (y=log x)

b

Could anyone post the answer to this?

16 is supposed to be next to Log(16) but lower. This is for both the Logs in the equation.

- Re: Algebra II -
**Reiny**, Tuesday, May 18, 2010 at 5:33pmSo we are looking at

log_{16}(9x+5) - log_{16</sub (x^2 - 1) = 1/2 log16</sub [(9x+5)/(x^2-1)] = 1/2 (9x+5)/(x^2-1) = 16^(1/2) (9x+5)/(x^2-1) = 4 4x^2 - 4 = 9x + 5 4x^2 - 9x - 9 = 0 (x-3)(4x + 3) = 0 x = 3 or x = -3/4 but when x = -3/4, the first log term is undefined (we can't take a log of a negative) so x = 3 }

**Answer this Question**

**Related Questions**

math - Logarithm!!! Select all of the following that are true statements: (a) ...

Algebra II - How to solve Log (9x+5) - Log ((x^2)-1) = 1/2 16 16 (The 16 is from...

Algebra-Please check - Write y = 10^(x) as a logarithmic function Choices are ...

algebra homework - please check my answers. Solve the logarithmic equation. Be ...

math(Please help) - 1) use the properties of logarithms to simplify the ...

Math Help Please - Which of the following expressions is equal to log (x sqrt-y...

Algebra 2 - how do not understand how to do this Log X + Lob (X-3) = 1 I know I ...

calculus - Please help me solve this equation. log[2](3)+log[2](x)=log[2](5)+log...

Math - h(x) = log (6x+5/7x-4) Find a formula for the inverse function h^-1(x) h...

Mathematics - Prove that log a, log ar, log ar^2 is an a.p. Is the following ...