Question

(2–¹×4–¹)/2–²

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Answer 1

$(2 ^{ - 1} \times 4 ^{ - 1} ) \div 2 ^{2} \\ = ( \frac{1}{2} \times \frac{1}{4} ) = ( \frac{1}{2} ^{2} ) \\ = \frac{1}{8} \div \frac{1}{4} \\ cancel \: out \: so \: we \: get \\ = \frac{1}{2} = 2 ^{1}$

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