if a+1/a =3 , find : a^2 + 1/a^2
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1
Answer:
7
Step-by-step explanation:
a+1/a=3
(a+1/a)²=3²
a²+1/a²+2a×1/a=9. [(a+b)²=a²+b²+2ab]
a²+1/a²+2=9
a²+1/a²=9-2
a²+1/a²=7
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