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 ( 38+ )
Otras preguntas
What is the missing exponent? (6^_____)^-4=6^20
which continent includes 45 degrees north latitude and 115 degrees East longitude
What is the difference between 4 twenty five and 3 twenty five
Which of the following is true of a human karyotype? A. Each cell has 22 pairs of homologous chromosomes B. Each cell has one pair of sex chromosomes C. The chr
Can you identify the 4th most abundant element in the universe?
Imagine that you're doing an experiment that requires you to smell the odor of a chemical solution in a beaker. Which procedure should always be followed? a. Wa
1)Which of the following describes a basic concept of democracy.? A) individual worth is valued more than the protection of all citizens. B) all men are of equa
in comparison with the inner planets of our solar system, which list of characteristic of the outer planets is accurate? a. larger with more moons b. smaller wi
Constantine's "new Rome" was established at the site of ancient Byzantium. Delhi. Thesolonnica. Ephesus. Alexandria.
Write five names for 1/4
