If $$a + \frac{1}{a} = 3,$$ then the value of $${a^3} + \frac{1}{{{a^3}}}$$ is? Options: A . &nbsp27 B . &nbsp24 C . &nbsp19 D . &nbsp18

If $$a + \frac{1}{a} = 3,$$ then the value of $${a^3} + \frac{1}{{{a^3}}}$$ �

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