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If x = (sqrt2-1 ) ^(-(1)/(2)) then the v...

If `x = (sqrt2-1 ) ^(-(1)/(2))` then the value of `(x ^(2) - (1)/(x ^(2))) ` is

A

2

B

`-2 sqrt2`

C

`2 sqrt2`

D

`-sqrt2`

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