A) \[\frac{-x}{\sqrt{1-{{x}^{4}}}}\]
B) \[\frac{x}{\sqrt{1-{{x}^{4}}}}\]
C) \[\frac{-1}{2\sqrt{1-{{x}^{4}}}}\]
D) \[\frac{1}{2\sqrt{1-{{x}^{4}}}}\]
Correct Answer: A
Solution :
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