Easy
1 point
ID: #28408
Question
x + 1/x = √5 হলে, x³ + 1/x³ এর মান কত?
Options
1
0
Correct Answer
2
3√5
Correct Answer
3
2√5
Correct Answer
4
5
Correct Answer
Explanation
আমরা জানি, a³ + b³ = (a + b)³ - 3ab(a + b)। এখানে, x³ + 1/x³ = (√5)³ - 3 * x * (1/x) * √5 = 5√5 - 3√5 = 2√5।
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Type
Single Choice
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