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If the function f:[1,oo)rarr[1,oo) is de...

If the function `f:[1,oo)rarr[1,oo)` is defined by `f(x)=2^(x(x-1)),t h e nf^(-1)(x)` is `(1/2)^(x(x-1))` (b) `1/2(1+sqrt(1+4(log)_2x))` `1/2(1-sqrt(1+(log)_2x)` (d) not defined

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