(5/7)raised to the power-1 * (7/4)raised to the power -1
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Step-by-step explanation:
Question : (5/7)^-1 × (7/4)^-1
Solution : (5/7)^-1 × (7/4)^-1
= (7/5)^1 × (4/7)^1
= 4/5
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