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
6 A student has a mass of 6.35 x 10^1 kg. What number below is the equivalent to the student's mass? * O A. 6.35 x 10^-2 g B. 6.35 x 10^4 g O C.635 g O D. 215 l
A forensic investigator is collecting hair samples from the victims and possible suspects of a violent attack. How many control samples of full length scalp ha
two thirds as many books b. Translate into algebraic expression plz
How did the domestication of plants and animals affect agrarian societies? Write your answer in a paragraph of at least 125 words. You don't need to write at le
Question 1 1 pts Given segment AB with points (-4, 8) and (6, 3) respectively. Find the coordinates of point P that partitions Segment AB in the ratio 3:2. The
Jorge reasons that the next letter in the sequence is M, since three letters of the alphabet are skipped between each listed. Which explains whether Marcy shoul
A car passes through a 20 meter speed trap in 5 seconds. How far will it go in 100 seconds?
Fifteen and one hundred thriteen thousandths
Determine if the expression -5y^5-y^3−5y5−y3 is a polynomial or not. If it is a polynomial, state the type and degree of the polynomimal.
Joe wants to buy a toaster that costs $15 dollars. The sales tax on the toaster is 5%. What is the total cost Joe will pay for the toaster? (Please explain how
