3 ^ { x - 1 } = \frac { 1 } { 27 } – InterviewSolution

1.	3 ^ { x - 1 } = \frac { 1 } { 27 }
Answer» 3^(x-1)=1/27=1/(3^3)=3^(-3)so x-1=-3so x=-3+1=-2

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