Answer:
1/5
Explanation:
When raised to the negative power, the numerator is inversed,
2^(-1) = 1/2
10^-1 = 1/10
2^-2 = 1/2^2 or 1/4
4^(-1/2) = 1/(4^(1/2)) = 1/2
25^(-1/2) = 1/25^(1/2) = 1/5
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