If x + 1/x = 5, then what is the value of x³ + 1/x³ ?

यदि x + 1/x = 5 हो, तो x³ + 1/x³ का मान क्या होगा ?

1. A125
2. B110
3. C115
4. D105

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Correct answer: B. 110

Explanation

x³ + 1/x³ = (x + 1/x)³ − 3(x + 1/x) = 125 − 15 = 110.

x³ + 1/x³ = (x + 1/x)³ − 3(x + 1/x) = 125 − 15 = 110।