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m²x>0
m²>0
m>0 -m<0
mэ(-∞;+∞)/0
2.(ImI-3)>0
ImI>3
m>3 m<-3
mэ(-∞;-3) i (3;+∞)
3.1/m²+1>0
m²+1>0
m²>-1
mэ(-∞;+∞)