A

1003055705

Level: 
A
Given the sets \begin{gather*} A = \{1; 2; 3; 4; 5; 6; 7; 8; 9\},\\ B = \{3; 4; 5; 6; 7\},\\ C = \{6; 7; 8; 9; 10; 11; 12\}, \end{gather*} find the union \( A\cup B\cup C \).
\( \{1; 2; 3; 4; 5; 6; 7; 8; 9;10; 11; 12\} \)
\( \{1; 2; 3; 4; 5; 6; 7; 8; 9\} \)
\( \{6; 7\} \)
\( \{1; 2; 10; 11; 12\} \)

1103028409

Level: 
A
The function \( f \) is given by the graph. Which of the statements about the domain and the range of the function \( f \) is true?
\( D(f) =[-3;4]; H(f)=[-2;2)\cup(2; 3]\cup\{5\} \)
\( D(f) =[-3;1)\cup(1; 4]; H(f)=[-2; 2)\cup(2; 3] \)
\( D(f)=[-3;4]; H(f)=[-2;5] \)
\( D(f) =[-3;4]; H(f)=[-2;3]\cup\{5\} \)