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(7*ln(3/x))'The calculation above is a derivative of the function f (x)

(7)'*ln(3/x)+7*(ln(3/x))'

0*ln(3/x)+7*(ln(3/x))'

0*ln(3/x)+7*(1/(3/x))*(3/x)'

0*ln(3/x)+7*(1/(3/x))*(((3)'*x-(3*(x)'))/(x^2))

0*ln(3/x)+7*(1/(3/x))*((0*x-(3*(x)'))/(x^2))

0*ln(3/x)+7*(1/(3/x))*((0*x-(3*1))/(x^2))

0*ln(3/x)+7*(-x^-1)

7*(-x)^-1

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