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Let (a+bx+cx^2)^10= sum(i=0)^(20) pi x^(...

Let `(a+bx+cx^2)^10= sum_(i=0)^(20) p_i x^(i), a,b,c in NN`. If `p_1=20 and p_2=210`, then `2(a+b+c)` is equal to

A

8

B

15

C

12

D

6

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