Multiple Choice Question (MCQ)
If a^{-\frac{1}{2} }= x , where a > 0 and x > 0 , which of the following equations gives a in terms of x ?
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×
a = \dfrac{1}{\sqrt{x} }
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✓
a=\dfrac{1}{x^2}
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×
a=\sqrt{x}
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×
a=-x^2