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HELP!! solve each logarithmic equation for the value of the variable. Be sure to check for extraneous solutions

HELP!! solve each logarithmic equation for the value of the variable. Be sure to check-example-1

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D:(4000)/(x) > 0 \wedge x\\ot =0\\D:x > 0\\\\\\\log\left((4000)/(x)\right)=3\\\e^3=(4000)/(x)\\\\x=(4000)/(e^3)

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User Savasia
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