NDA Math Binomial Theorem
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If ( 1 + 2 x − x 2 ) 6 = a 0 + a 1 x + a 2 x 2 + . . . + a 12 x 12 , a 0 − a 1 + a 2 − a 3 + a 4 − . . . . + a 12
[NDA-I 2020]
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