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Solution


Q.

Let A={z∈ℂ: |z-2|≤4}  and 

B={z∈ℂ: |z-2|+|z+2|=5}.

Then the max  {|z1-z2:z1∈A and z2∈B} is:   [2026]
1 9  
2 8  
3 15/2  
4 17/2  

Ans.

(4)