Bài 2: Cho A= x in mathbb R :; [ matrix x= - Dicamon

Question

Bài 2: Cho A= x in mathbb R :; [ matrix x<=-5  x>=5 matrix ];; B = {x ∈ℝ / - 10 < x < 4} ; C = {x ∈ℝ / 1 < x <= 9} Tim: 1.D D=(A cup B) cup C 5 . D=(A cap B) ba

Answer

A= x in R:[ matrix 1<=-5 2,5 matrix  =(- infty;-5)u(5;+ infty); 3= xeR-10 langle x<4 =(-10;4); C = {x ∈K / 1 < x <= 9} = (1; 9); D=(A cup B) cup C=(- infty;+ infty) 2. D=(A UB) cap

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