Easy
1 point
ID: #25308
Question
x + 1/x = 4 হলে x³ + 1/x³ = কত?
Options
1
147
Correct Answer
2
52
Correct Answer
3
70
Correct Answer
4
76
Correct Answer
Explanation
আমরা জানি, a³ + b³ = (a + b)³ - 3ab(a + b)। এখানে a = x এবং b = 1/x।
প্রদত্ত মান, x + 1/x = 4।
∴ x³ + 1/x³ = (4)³ - 3 * x * (1/x) * 4
= 64 - 12
= 52।
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