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15. Please check and make sure both of my answers are right on this question.

label Algebra
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Oct 19th, 2017

9(5^3x)=1  =>  9((e^xln(5))^3) = 1  =>  e^(3xln(5)) = e^ln(1/9)  => 3xln(5)=ln(1/9)  => x= -ln(9)/ 3ln(5) 

=>   x= -0.4550708  

and  x = - 0.455 is correct

Good Luck 

Apr 26th, 2015

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