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If a^2-2a-1=0, then find a-1/a,a+1/a,a^2...

If `a^2-2a-1=0`, then find `a-1/a,a+1/a,a^2+1/a^2` and `a^2-1/a^2`.

Text Solution

Verified by Experts

The correct Answer is:
`2,pm2sqrt(2),6,pm4sqrt(2)`
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