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Question

Is the following set empty ?
{ x : x is a real number and $$x ^ { 2 }$$ < 0 }


Solution

$$x^{2}< 0\Rightarrow $$ x can not be real. 
But it is given that x is real .
Hence there are no x is possible and the set is empty.

1215952_1330448_ans_c0c8ae0ecdd94d98af5dec05d1f6c2a5.jpg

Mathematics

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