Indices/Logarithm

Question

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904

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Can anyone solve this question with solutions/works.

3^(x-1)-3^(x)=-6

Thanks...

Guest Oct 1, 2012

Hellas · Answer 1 · 2012-10-02T06:33:24

3^(x-1)-3^(x)=-6 => -(3^χ)/3-3^χ=-6 =>3^-3*3^χ=-18 => -2*3^χ=-18 => 3^χ=9
=> 3^χ=3^2 => χ=2

admin · Answer 2 · 2012-10-03T09:56:16

[input]3^(x-1)-3^(x)=-6[/input]