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 ( 56+ )
Otras preguntas
Which term best describes is a way of acquiring knowledge that cannot be obtained by inference, deduction, observation, reason, analysis or experience?
Select the function that represents a geometric sequence.
What is 49.2532 to 1 decimal place
A normal probability/quantile plot is used to see if the distribution of a quantitative variable follows a __________ distribution.
How to solve this P-1=5p+3p-8
how is a well designed investigation developed
What is the relationship between 9.6×10^−2 and 9.6×10^−5 ? Select from the drop-down menus to correctly complete the statement. 9.6×10−2 is
A patient comes in showing signs of severe depression. Dr. Jorgenson wants to order an EEG and hormone panel, while Dr. Frieden wants to set up a system of rew
Miles is 75 and he has been diagnosed with presbycusis. what can he do to help him cope with this problem
Total institutions, such as boot camps, prisons, and some mental hospitals, are examples of
