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Question
Difficulty Level:

Easy

MCQ

Which expression is equivalent to 42724^{-2} \cdot 7^{-2} ?

Select all that apply :

1282\frac{1}{28^{2}}

(7.4)2(7.4)^{2}

(7.4)4(7.4)^{-4}

7242\frac{7^{-2}}{4^{2}}

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