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 ( 37+ )
Otras preguntas
what is the full form of com
A) 8-( +16 ) B) (-2 )- (-9)
Select three of the languages that are steps English went through before it became Modern English. Old French Indo-European Germanic Celtic Old English Yiddish
Calculate the pH of a buffer prepared by mixing 500 ml of 0.38 M acetic acid with 500 ml of 0.25 M sodium acetate. pKA for acetic acid is 4.76 (a) Calculate the
What is the prime factor of 76, 18, 63, 45, and 27 need some serious help ASAP.
Can someone better explain what humanism means? This is from Psychology
one i read 3 novels with the first having 120 more pages than the second and the second having 75 fewer pages than the third. i read 1005 pages. how many pages
the graph of a linear equation may not be a straight line?true or false
Change each fragment to a complete sentence 1. Writing a fairy tale 2. In her fairy tale, the main character Louisa 3. Louisa heard that the wizard
Heterozygotes at the sickle-cell locus produce both normal and abnormal (sickle-cell) hemoglobin (see Concept 11.4). When hemoglobin molecules are packed into a
