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If a2x+2 = 1 where is a positive real number other...

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Algebra
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If a2x+2 = 1, where is a positive real number other than 1, then x is equal to?

Answer & Solution
Correct Answer: Option B
$$\eqalign{ & \Rightarrow {a^{2x + 2}} = 1 \cr & \Rightarrow {a^{2x + 2}} = {a^0} \cr & \Rightarrow 2x + 2 = 0 \cr & \Rightarrow x = - \frac{2}{2} \cr & \Rightarrow x = - 1 \cr} $$
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