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ddaal |
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Answer» ( 999 )^3= ( 1000 - 1)^3 ( a - b )^3= a^3- b^3- 3ab ( a - b ) ... ( 1000 - 1 )^3= 1000^3- 1^3- 3000 ( 999 ) = 1000000000 - 1 - 2997000 = 997002999 thank you so much dear |
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