jhernandez5167
jhernandez5167
02-02-2015
Mathematics
contestada
solve for x
log(x–4)+log(x+3)=2logx
Respuesta :
konrad509
konrad509
02-02-2015
[tex]D:x-4>0 \wedge x+3>0 \wedge x>0\\ D:x>4 \wedge x>-3 \wedge x>0\\ D:x>4\\\\ \log(x-4)+\log(x+3)=2\log x\\ \log(x-4)(x+3)=\log x^2\\ (x-4)(x+3)=x^2\\ x^2+3x-4x-12=x^2\\ -x=12\\ x=-12\\ -12\not\in D\\ \Downarrow\\ \boxed{x\in\emptyset}[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 44+ )
Otras preguntas
What caused the tension between the us and the soviet union after the united states ?
What happens when the supply of energy-rich molecules in a muscle is used up?
The chart shows characteristics of stars. Sirius is a blue-white star with a surface temperature of about 9800 K. What is most likely the mass of Sirius? 1
write the computation in words for an expression that uses all four operations (addition, subtraction, multiplication, and division). Then write the expression
Discuss how forests act as carbon sinks.
Higher liquidity oftrn leads to idle cash reserved which reduces profitability. True or false
If you triple 4 and subtract 2 each day, how many days until you have zero?
Do businesses and other non-governmental institutions need diplomats—and if so, under what circumstances? How about revolutionary movements, or terrorist organi
2. Choose the word or phrase that best matches the word in italics. That he could do something so contemptible was hard to believe. (1 point) worthy of res
the national rainbow alliance coalition ( NARC) was famous for doing what? A. being the very first political party formed in Kenya B. Becoming one of the few mo
