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Question
If $$a + \frac{1}{a} + 1 = 0\left( {a \ne 0} \right){\text{,}}$$     then the value of $$\left( {{a^4} - a} \right)\,{\text{is?}}$$
Options:
A .  0
B .  1
C .  2
D .  -1
Answer: Option A

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