A) \[(\vec{a}+\vec{b})={{a}^{-2}}+{{b}^{-2}}\]
B) \[(\vec{a}-\vec{b})={{a}^{-2}}+{{b}^{-2}}\]
C) \[{{(\vec{a}-\vec{b})}^{2}}={{\left( \vec{a}+\vec{b} \right)}^{2}}\]
D) All of these
Correct Answer: D
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