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 ( 53+ )
Otras preguntas
Colleen took out a 30 year loan for $145,000 at an APR of 4.5% compounded monthly. Approximately what would the total cost of her loan be if she paid it off 8 y
Question 18 of 20 : Select the best answer for the question. 18. Use the map to answer the question. Which geographic area had the most population and econo
The ice cream shop is the between the school and the library on Main Street. It is 500 yards from the school to the library. The ice cream shop is 3/10 of the w
in triangle ABC, AB=12,BC=15, and AC=22. List the angles from largest to smallest
Michelle invests her money in an account earning simple interest. What can she expect to happen to the balance of her account. A. The balance will increase line
Yesterday's afternoon temperature was 21 degrees Fahrenheit. It plunged overnight to -3 degrees Fahrenheit. How many degrees did the temperature change? A. 3 De
in rectangle ABCD, AB = 8 units and BC = 15 units. Find BD
What does the documentary inform us on the evolution and the endurance of The Constitution. Why do all Americans revere it and yet have such radically different
provide an example of a open-end credit account that caroline has
please help me with this ty so much
