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Sagot :
It would be x= 2.5 because before anything you would plug in a number such as 2.5 in for x and subtract one. You wouldn't put it to the nine yet. So it would be 9^(2.5-1)=27. Then once you subtracted it would equal 9^1.5=27. So lastly take 9 to the 1.5 power or 9^(1.5) and you get 27=27.
[tex]9^{x - 1} = 27 \\ln(9^{x - 1}) = ln(27) \\(x - 1)ln(9) = ln(27) \\x - 1 = \frac{ln(27)}{ln(9)} \\x = \frac{ln(27)}{ln(9)} + 1 \\x = 2.5[/tex]
Thhe answer is equal to A. x = 2.5.
Thhe answer is equal to A. x = 2.5.
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