જો x 2 - \(\frac{1}{x^2}\) = 4 \(\sqrt2\) , તો x 4 - \(\frac{1}{x^4}\) ની કિંમત શું છે?

1
16 \(\sqrt2\)
2
8 \(\sqrt2\)
3
24 \(\sqrt2\)
4
32 \(\sqrt2\)

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