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 ( 73+ )
Otras preguntas
Please help! On part B!
Evaluate the equation. -8x = -90
The molality of a solution is a measure of - A - moles of solute per kilogram of solution B - moles of solute per liter of solution C - moles of solute per kil
Who was the only president to be elected more than twice?
Which best describes Paris’s reaction when he believes that Juliet has died? He’s angry that the friar gave her poison. He’s relieved that the wedding is cancel
What is the relationship between rone and perspective in a narrative text? A. Perspective and tone are two names for the same thing.B. Tone is a point of view,
What is the domain of the function y=2 sqrt x-6 ?
What is the equation of the line of best fit for the following data? Round theslope and y-intercept of the line to three decimal places.A y=-4.105x+1.560B. y =
What statement best describes the relationship between HTML, XML, and XHTML? A.They are all markup languages, and all have some commonalities and dissimilaritie
A bakery has 63 donuts and 36 muffins for sale. What is the ratio of muffins to donuts?
