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1/4
Explanation:Note that:
[tex]a^{-b}=\frac{1}{a^b}[/tex]Applying this rule to the given expression:
[tex]2^{-2}=\frac{1}{2^2}[/tex]Simplifying further, we have:
[tex]2^{-2}=\frac{1}{4}[/tex]