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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 10: Cho A=[-4;-2] và (3;7]. Tìm A giao B, A hợp B, A\B, B\A

Toán Lớp 10: Cho A=[-4;-2] và (3;7]. Tìm A giao B, A hợp B, A\B, B\A

Comments ( 2 )

  1. $A∩B=∅$
    $A∪B=[-4;-2]∪(3;7]$
    $A\B=[-4;-2]$
    $B\A=(3;7]$
     

  2. $\displaystyle \begin{array}{{>{\displaystyle}l}} A=-4\leqslant x\leqslant -2\\ B=3< x\leqslant 7\ \\ \rightarrow A\ \cap B\ =\ rỗng\ \\ A\cup B=[ -4;-2] \cup ( 3;7]\\ A/B=-4\leqslant x\leqslant 2=[ -4;-2]\\ B/A=3< x\leqslant 7=( 3;7] \end{array}$

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222-9+11+12:2*14+14 = ? ( )

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