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प्रश्न
Express `16/81` and `(-16)/81` as powers of a rational number.
बेरीज
उत्तर
∵ 16 = 4 × 4 = 42
And 81 = 9 × 9 = 92
∴ `16/81 = (4)^2/(9)^2 = (4/9)^2` and `(-16)/(9)^2 = - (4/9)^2`
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