Mathematics, 09.10.2021 14:00 tordiacasey

Câu 1. Cho mệnh d dot hat e :^ *** forall x in mathbb R ,x^ 2 +3x+5>0" Mệnh đề phủ định của mệnh đề trên là A. forall x in mathbb R ,x^ 2 +3x+5<=0 . C. forall x in mathbb R .x^ 2 +3x+5<0 . B. exists x in mathbb R ,x^ 2 +3x+5<=0 . D. exists x in mathbb R ,x^ 2 +3x+5>0 .

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Câu 1. Cho mệnh d dot hat e :^ *** forall x in mathbb R ,x^ 2 +3x+5>0" Mệnh đề phủ định của mệnh...