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[" Comprehensions "(Q.7toQ.9):],[" Let "...

[" Comprehensions "(Q.7toQ.9):],[" Let "x_(i)^( prime)s,i=1,2,..." n be a sequence of integers such that: "x_(1)in[-1,2],1=1,2],[quad sum_(i-1)^(n)x_(1)=19" and "sum_(i=1)^(n)x_(i)^(2)=99],[" 7."" The minimum possible value of "sum_(H)^(n)x_(i)^(3)" is "],[[" (A) "18," (B) "21," (C) "19," (D) "13]]

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