Intervals

Which set describe interval marked on number line

• (- $\infty$  ;-1> $\cup$  (2;+ $\infty$  )

• [-1;2) $\cap$  (- $\infty$ ;+ $\infty$ )

• (- $\infty$ ;-1> $\cup$  <2;+ $\infty$ )

•  $\infty$  

The result of diffrence of sets 

A= {-4,-2,0,1,2} B={-3,0,2,5} 

• {0,2}

• {-4,-3,-2,1,5}

• {-4,-2,1}

• {-3,5}

Which of these sets is left-opened

• [2;6)

• {1,2,3,5,7,9}

• (-1;8)

• (2;3]

What does the "Intersection" mean in polish

which of these sets are unbounded

• (- $\infty$ ;2]

• (7;+ $\infty$ )

• [1;9]

• (4;6)

The result of [-5;1)  $\cup$  {1}

• (-5;1]

• {1}

• [-5;1]

• [-5;1)

complement of interval [-2;5)

• R

• (-5;2]

• (- $\infty$ ;2) $\cup$ <5; + $\infty$ )

• N

how many prime numbers are in set A=<2;8>

• 2

• 3

• 5

• 4

A=[-3;3] B= (0;6)  A $\cap$ B=

• [-3;6)

• (0;3]

• [0;3)

• [-3;0]

A  $\cup$  B

• [-3;2)

• (-1;2)

• (2;4)

• [-3;4)