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 ( 91+ )
Otras preguntas
You are constructing a tangent line from a point outside a given circle to the circle is to draw a circle and a point outside the circle. You have drawn the cir
The majority of the people in Central America earn their living from_____ Tourism Farming Fishing Industry
What graph represents the inequality y≥2−2x? Graph of a solid line on a coordinate plane. The horizontal x axis ranges from negative 5 to 5 in increments of 1.
Is the function even odd or neither
What kinds of substances diffuse most readily through a cell membrane
What is 2.3 (3 reapeating )as a fraction
What is an example the first author gives how science has solved a problem
Could someone explain the answer? GIVING 12 POINTS
how do u wright 3.3 in rational numblersl
Does the following system of equations have a solution? graph of lines y equals 2 x minus 5 and y equals negative 3 x plus 1 yes no
