Easy
1 point
ID: #25412
Question
x + 1/x = √5 হলে, x³ + 1/x³ = কত?
Options
1
5
Correct Answer
2
2
Correct Answer
3
5√2
Correct Answer
4
2√5
Correct Answer
Explanation
সূত্র: a³+b³ = (a+b)³ - 3ab(a+b)। এখানে, (√5)³ - 3(√5) = 5√5 - 3√5 = 2√5। সঠিক উত্তর 2√5।
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Type
Single Choice
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