Question

a) A = (\(-\infty\) ;2 ] ; B = \(\left(0;+\infty\right)\)

tìm A hợp B, A giao B, A trừ B, B trừ A

b) \(C=\left(-7;7\right);D=\left[5:10\right]\) 

tìm C hợp D, C giao D, C trừ D, D trừ C

c) E = (-3 ; 3 ] ; F = (0;1)

tìm E hợp F , E giao F, E trừ F, C_EF, C_RF

Answer 1

`a)A=(-oo;2]`  ;   `B=(0;+oo)`

`A uu B=RR

`A nn B=(0;2]`

`A \\ B=(-oo;0]

`B \\ A=(2;+oo)

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`b)C=(-7;7)`   ;   `D=[5;10]`

`C uu D=(-7;10]`

`C nn D=[5;7)`

`C \\ D=(-7;5)`

`D \\ C=[7;10]`

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`c)E=(-3;3]`  ;    `F=(0;1)`

`E uu F=(-3;3]`

`E nn F =(0;1)`

`E \\ F=(-3;0] uu [1;3]`

`C_E F=(-3;0] uu [1;3]`

`C_R F=(-oo;0] uu [1;+oo)`