Question

a2 - 4a-1=0 then find a-1/a,a+1/a,a2+1/a2​

Answer 1

Answer:

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Step-by-step explanation:

ANSWER

a2−4a−1=0

⇒aa2−1=4⇒a−a1=4

Now, a2+3a+a21=a3

=a2+a21+3(a−a1)=(a−a1)2+2+3(a−a1)

=42+2+3×4=30.

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