kasomers37 kasomers37
  • 10-02-2019
  • Mathematics
contestada

how do I solve ln(3x-5)=ln11+ln12

Respuesta :

gmany
gmany gmany
  • 13-02-2019

Answer:

[tex]\large\boxed{x=\dfrac{137}{3}}[/tex]

Step-by-step explanation:

[tex]\text{Use:}\\\\\ln a+\ln b=\ln(ab)\\\\\ln a=\ln b\Rightarrow a=b\\-------------\\Domain:\\\\3x-5>0\qquad\text{add 5 to both sides}\\\\3x>5\qquad\text{divide both sides by 3}\\\\x>\dfrac{5}{3}\\-----------------\\\\\ln(3x-5)=\n11+\ln12\\\\\ln(3x-5)=\ln(11\cdot12)\\\\\ln(3x-5)=132\iff3x-5=132\qquad\text{add 5 to both sides}\\\\3x=137\qquad\text{divide both sides by 3}\\\\x=\dfrac{137}{3}[/tex]

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