(a + 1/a) = 3 হলে (a2 + 1/a2 ) = কত?
Solution
Correct Answer: Option B
দেওয়া আছে, (a + 1/a) = 3
∴ (a2 + 1/a2 ) = (a + 1/a)2 - 2.a.(1/a)
= 32 - 2
= 9 - 2
= 7
∴ (a2 + 1/a2 ) = (a + 1/a)2 - 2.a.(1/a)
= 32 - 2
= 9 - 2
= 7
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