SOLUTION: what is the unknown of 2^x-1=1/128

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Question 434980: what is the unknown of 2^x-1=1/128
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
what is the unknown of 2^x-1=1/128
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2^(x-1) = 2^-7
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x-1 = -7
x = -6
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cheers,
Stan H.
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