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[f:[2,oo)rarr(-oo,4]," where "f(x)=x(4-x...

[f:[2,oo)rarr(-oo,4]," where "f(x)=x(4-x)," then "f^(-1)(x)" is "],[[" (A) "2-sqrt(4-x)," (B) "2+sqrt(4-x)," (C) "-2+sqrt(4-x)," (D) "-2-sqrt(4-x)]]

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