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 ( 11+ )
Otras preguntas
Which is non-renewable source of energy wind energy? - Sun - Natural gas - Wind - Tidal waves
What is 1984 about? Should I read it?
Find the slope of the line that passes through (7,2) and (9,5)
6) The coordinates of K are (-7, 8) and the coordinates of ] are (6,-3). Find the coordinates of the midpoint of JK.
Explain why carbon is called ""the backbone"" molecule of organic chemistry and why organic molecules couldn't easily be based on h or o instead.
write open question about social media
Which area of the stage was out of view of the audience
What is 1984 about? Should I read it?
Which of the following might describe the setting of a story? answer choices a frog and a witch happy and loving a high school in 1956 love is stronger than fea
The rational function g(x) = x+10/x can be rewritten in the form g(x) = c+ r/x, where c and r are constants. Which expression is the result? a. g(x) = x +10/x b
