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 ( 89+ )
Otras preguntas
Donna makes a round pizza. She wants to put a cheese layer on the pizza. If the cake is 8 cm in diameter, how many square cm of cheese layer does she need to pu
A rainforest is an example of a _____. -biome -community -habitat -population
Which function has real zeros at x = 3 and x = 7? A- f(x) = x^2 + 4x – 21 B- f(x) = x^2 – 4x – 21 C- f(x) = x^2 – 10x + 21 D- f(x) = x^2 – 10x – 21
A system of equations is shown below: y = 8x − 2 y = 9x − 7 What is the solution to the system of equations? (−5, 38) (−5, −38) (5, 38) (5, −38)
A student is trying to solve the set of two equations given below: Equation A: x + z = 6 Equation B: 3x + 2z = 1 Which of the following is a possible step used
Jackie has a puzzle book that contains a total of 65 puzzles. She has completed 2/5 of the puzzle. If Jackie completes 13 more puzzles, what is the total number
Is fungus considered as a decomposer?
what are the roots of the equation x^2+4x-16=0
Which place name has no errors in punctuation? A.Palm Harbor FL. B.Palm, Harbor FL C.Palm Harbor Flor. D.Palm Harbor, FL
what operation should be performed first to solve -3x+5<23
