1.

valuate by using suitable identities : (1001)3

Answer»

(1001)3 = (1000 + 1)3

[ ∵ (x + y)3 = x3 + 3x2y + 3xy2 + y3

= 10003 + 3(1000)2 (1) + 3(1000) (1)2 + 13

= 1000000000 + 3000000 + 3000 + 1 

= 1003003001



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