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 ( 75+ )
Otras preguntas
How did war in Europe change spains plans for its North American colonies
What is the value of x? A.10 B.12 C.1 D.4
Read this passage about seals and sea lions and then answer the question that follows: From a distance, they both look like seals, but once you get up close y
Find the image position for a picture placed 3.0 cm outside the focal point of a converging lens with a 4.0 cm focal length. a. 6.2 cm c. 2.8 cm b. 9.3
List the partial products in 35x7
why was Benjamin Franklin so respected
2x+y=4 how do I graph this
Using technology, determine the monthly payment on a 35 month loan of $28,000 at 8.1% compounded annually. Round you answer to the nearest cent. a. $900.90 b.
A student’s study habits are a good indicator of whether or not academic success is important to them. Please select the best answer from the choices provide
What is the chemical formula for copper(II) sulfate? CuSOmc026-1.jpg