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(2*ln(12/x))'The calculation above is a derivative of the function f (x)
(2)'*ln(12/x)+2*(ln(12/x))'
0*ln(12/x)+2*(ln(12/x))'
0*ln(12/x)+2*(1/(12/x))*(12/x)'
0*ln(12/x)+2*(1/(12/x))*(((12)'*x-(12*(x)'))/(x^2))
0*ln(12/x)+2*(1/(12/x))*((0*x-(12*(x)'))/(x^2))
0*ln(12/x)+2*(1/(12/x))*((0*x-(12*1))/(x^2))
0*ln(12/x)+2*(-x^-1)
2*(-x)^-1
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