Question

(1) A = {x/xEI, x
² is not positive}





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Answer 1

Answer:

I didn't understant your question please write clearly

Answer 2

Terminology for signs

A number is positive if it is greater than zero. A number is negative if it is less than zero. A number is non-negative if it is greater than or equal to zero. A number is non-positive if it is less than or equal to zero.