x - 1/x = 5 হলে (x + 1/x)2 এর মান কত?
Solution
Correct Answer: Option D
দেয়া আছে
x - 1/x = 5
আমরা জানি,
(x + 1/x)2
= (x - 1/x)2 + 4.x.1/x
= 52 + 4 [মান বসিয়ে]
= 25 + 4
= 29
x - 1/x = 5
আমরা জানি,
(x + 1/x)2
= (x - 1/x)2 + 4.x.1/x
= 52 + 4 [মান বসিয়ে]
= 25 + 4
= 29
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