Respuesta :

bcalle
x = 5
Condense the left side.
log x(3x-13)=1
Put a base 10 on each side to clear the log.
x(3x-13)=10
3x^2-13x-10=0
Factoring you get x=5 and x=-2/3. The domain for log is x>0 so the -2/3 is an extraneous solution.

The solutions for [tex]\log x + \log (3\cdot x - 13) = 1[/tex] are [tex]x_{1} = 5[/tex] and [tex]x_{2} = -\frac{2}{3}[/tex], respectively.

In this question, we are going to solve for [tex]x[/tex] with the help of Logarithm Properties, which are described in the image attached below.

[tex]\log x + \log (3\cdot x - 13) = 1[/tex]

[tex]\log [x\cdot (3\cdot x - 13)] = 1[/tex]

[tex]\log (3\cdot x^{2}-13\cdot x) = 1[/tex]

[tex]10^{\log(3\cdot x^{2}-13\cdot x)} = 10^{1}[/tex]

[tex]3\cdot x^{2}-13\cdot x = 10[/tex]

[tex]3\cdot x^{2}-13\cdot x -10 = 0[/tex]

This is a Second Order Polynomial, which can be solved by Quadratic Formula:

[tex]x_{1} = 5[/tex] and [tex]x_{2} = -\frac{2}{3}[/tex]

The solutions for [tex]\log x + \log (3\cdot x - 13) = 1[/tex] are [tex]x_{1} = 5[/tex] and [tex]x_{2} = -\frac{2}{3}[/tex], respectively.

Please see this question related to Logarithm Properties for further details:

https://brainly.com/question/12983107

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