1 . x + y = 3 এবং xy = 2 হলে, x3 + y3 এর মান কত?
Answer: Option B
Explanation:
x3 + y3 = ( x + y)3 - 3.x.y ( x + y)
= ( 3)3 - 3.2.3 = 27 - 18 = 9
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