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[" 2.If "f(x)=cos^(-1)[(1-(log x)^(2))/(...

[" 2.If "f(x)=cos^(-1)[(1-(log x)^(2))/(1+(log x)^(2))]" ,then "f'(e)],[[" (a) "(1)/(e)," (b) "(2)/(e^(2))],[" (c) "(2)/(e)," (d) "1]]

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