Monday

March 2, 2015

March 2, 2015

Posted by **Deb** on Wednesday, April 24, 2013 at 3:49pm.

Log x +log2x = 4

Wouldn't this be no solution because log x is undefined?

- college algebra -
**Reiny**, Wednesday, April 24, 2013 at 6:09pmlogx + log 2x = 4

log (x(2x)) = 4 , using the rule log AB = logA + logB

log (2x^2) = 4

so 2x^2 = 10^4

2x^2 = 10000

x^2= 5000

x = ± √ 5000

but x > 0 for log x to be defined

so x = √5000

**Answer this Question**

**Related Questions**

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

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

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

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

math - solve for x without using a calculator 5^(x+1) = 25 i know that x would ...

College Algebra - Solve the logarithmic equation for x. log(base 3)(x+6) - log(...

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

College Algebra - Solve the logarithmic equation. Express your solutions in ...

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

college algebra - solve the following logarithmic equation. 1. 2log(lower2) (x-2...