If \(a-\dfrac{1}{a}=7\), then \(a^3 - \dfrac{1}{a^3}= \ ?\) – McqOptions

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1.	If \(a-\dfrac{1}{a}=7\), then \(a^3 - \dfrac{1}{a^3}= \ ?\)
A.	322
B.	364
C.	357
D.	343
Answer» C. 357

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