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If |z1=1,|z2|=2,|z3|=3 and |z1+z2+z3|=1,...

If `|z_1=1,|z_2|=2,|z_3|=3 and |z_1+z_2+z_3|=1, then |9z_1z_2+4z_3z_1+z_2z_3|` is equal to (A) 3 (B) 36 (C) 216 (D) 1296

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If |z_1|=1, |z_2|=2, |z_3|=3 and |9z_1z_2 + 4z_1z_3 + z_2z_3|=36 , then |z_1+z_2+z_3| is equal to :

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