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(8/ln(x))'The calculation above is a derivative of the function f (x)
((8)'*ln(x)-(8*(ln(x))'))/((ln(x))^2)
(0*ln(x)-(8*(ln(x))'))/((ln(x))^2)
(0*ln(x)-(8*(1/x)))/((ln(x))^2)
(-8*x^-1)/((ln(x))^2)
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