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If f[1, oo)rarr[1, oo) is defined by f(x...

If `f[1, oo)rarr[1, oo)` is defined by `f(x)=2^(x(x-1))` then `f^(-1)(x)=`

A

`((1)/(2))^(x(x-1))`

B

`(1)/(2)(1+sqrt(1+4log_(2)x))`

C

`(1)/(2)(1-sqrt(1+4log_(2)x))`

D

Not defined

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The correct Answer is:
B
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