If x – 1/x = 4, find the value of x^3 – 1/x^3.
A52
B64
C76
D88
Explanation
x^3 – 1/x^3 = (x – 1/x)^3 + 3(x – 1/x) = 4^3 + 3(4) = 64 + 12 = 76.
Exam Relevance
- Topic: Algebra
- Subtopic: Identities
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