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प्रश्न
Find the cube of: `1 2/7`
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उत्तर
`1(2)/(7)`
= `(1 2/7)^3`
= `((1 xx 7 + 2)/7)^3`
= `(9/7)^3`
`= (9 xx 9 xx 9)/(7 xx 7 xx 7) = 729/343 = 2 43/343`
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