3.Express (5 ⁻¹ - 7⁻¹)⁻¹ as a rational number
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Answer:
35/2 or 17.5
Step-by-step explanation:
(5 ⁻¹ - 7⁻¹)⁻¹
=> (1/5 - 1/7)⁻¹ [x^-y = 1/(x^y)]
=> [(7 - 5)/35]⁻¹
=> (2/35)⁻¹
=> 35/2 or 17.5
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