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 ( 58+ )
Otras preguntas
Quick help, please? What is the significance of the similarities and differences between William Kamkwamba's story and Calvin Stanley's story? All I need to kno
Which sentence has no errors in the use of quotation marks? A. Mr. Thompkins said "boys, can you rake the leaves, too?" B. She told me "you don't know what you'
What is the synonym for discussion
8. Which statement best describes the Richter scale? A. It's named after a scientist who studied tornadoes. B. It's a numerical rating system that measures
a florist sold bouquets of red roses to 15 of the first 20 customers who came into his shop. What is the experimental probability how many bouquets of red roses
An increase in the atmospheric levels of carbon dioxide (CO2) is the biggest contributor to which of the following? A . global warming B . El Niño C. wind storm
which transformation preserves similarity between the preimage and image, but does not preserve congruence
The principle difference between point source and nonpoint source water pollution is _______. a. whether the pollution is organic or inorganic b. the number of
How are fossils of extinct organisms included in branching diagrams
Which personal pronoun agrees with the antecedent in this sentence? Everybody who participates in the boys' soccer camp must bring __________ own bag lunch. A.
