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Let S_1 = \ z_1 \in \mathbbC : |z_1 - 3| = \tfrac12 \ and S_2 = \ z_2 \in \mathbbC : |z_2 - |z_2 + 1|| = |z_2 + |z_2 - 1|| \. Then, for z_1 \in S_1 and z_2 \in S_2, the least value of |z_2 - z_1| is : | Watch the step-by-step video solution for this NIMCET PYQ.