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