(a + 1/a)2 = 3 হলে, ( a3 + 1/a3) এর মান কত?
Solution
Correct Answer: Option A
(a + 1/a)2 = 3
বা, a + 1/a = √3
a3 + 1/a3
= (a + 1/a)3 - 3 a.a/b (a + 1/a)
= (√3)3 - 3 . √3
= 3√3 - 3√3
= 0
বা, a + 1/a = √3
a3 + 1/a3
= (a + 1/a)3 - 3 a.a/b (a + 1/a)
= (√3)3 - 3 . √3
= 3√3 - 3√3
= 0
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