If `x=2/(3+sqrt(7))` , then `(x-3)^2=` 1 (b) 3 (c) 6 (d) 7

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If x=2/(3+sqrt(7)) , then (x-3)^2= (a)1 (b) 3 (c) 6 (d) 7

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lim_(x->oo)(30+4sqrt(x)+7x^(1/3))/(2+sqrt(4x-7)+(6x-2)^(1/3) equals a)15 (b) 2 (c) 3/2 (d) 0