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Solution


Q.

Which of the following set is empty
1 {x∈R∣x2=9  and 2x=6}  
2 {x∈R∣x2=9 and 2x=4}  
3 {x∈R∣x+4=4}  
4 {x∈R∣2x+1=3}  

Ans.

(2)