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[" 66.If "f:[1,alpha)>[2,alpha)" is give...

[" 66.If "f:[1,alpha)>[2,alpha)" is given by "f(x)quad x,(1)/(x)," then "f^(-1)(x)" equal to "],[[" (1) "(x+sqrt(x^(2)-4))/(2)," (2) "(x)/(1+x^(2))," (3) "(x-sqrt(x^(2)-4))/(2)," (4) "1+sqrt(x^(2)-4)]]

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