twenty1randomletters
twenty1randomletters twenty1randomletters
  • 24-05-2017
  • Mathematics
contestada

log*subscript*(3x − 2) 4096 = 3

I got x= negative 6 is this correct??

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apologiabiology
apologiabiology apologiabiology
  • 24-05-2017
remember

[tex]log_a(b)=c[/tex] translates to [tex]a^c=b[/tex]
and
[tex]log_a(b^c)=clog_a(b)[/tex]
so


4096=16^3
[tex]log_{3x-2}(4096)=3[/tex]
[tex]log_{3x-2}(16^3)=3[/tex]
[tex]3log_{3x-2}(16)=3[/tex]
divide both sides by 3
[tex]log_{3x-2}(16)=1[/tex]
translate
[tex](3x-2)^1=16[/tex]
3x-2=16
add 2 to both sides
3x=18
divide both sides by 3
x=6
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