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(3.14/(9*x))'The calculation above is a derivative of the function f (x)
((3.14)'*9*x-(3.14*(9*x)'))/((9*x)^2)
(0*9*x-(3.14*(9*x)'))/((9*x)^2)
(0*9*x-(3.14*((9)'*x+9*(x)')))/((9*x)^2)
(0*9*x-(3.14*(0*x+9*(x)')))/((9*x)^2)
(0*9*x-(3.14*(0*x+9*1)))/((9*x)^2)
(0*9*x-(3.14*9))/((9*x)^2)
-0.34888889*x^-2
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