a)
[tex]\displaystyle\bf\\f(1)=1\\\\f(6)=-2\\\\f(-4)=4[/tex]
б)
[tex]\displaystyle\bf\\D(f)=\Big[-4 \ ; \ 6\Big][/tex]
в)
[tex]\displaystyle\bf\\E(f)=\Big[-2 \ ; \ 4\Big][/tex]
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Answers & Comments
a)
[tex]\displaystyle\bf\\f(1)=1\\\\f(6)=-2\\\\f(-4)=4[/tex]
б)
[tex]\displaystyle\bf\\D(f)=\Big[-4 \ ; \ 6\Big][/tex]
в)
[tex]\displaystyle\bf\\E(f)=\Big[-2 \ ; \ 4\Big][/tex]