1) f( -2 ) = 3 + 8 = 11 -- Не верно
2) f( 1/2 ) = 3 - 2 = 1 -- Верно
3) f( 0 ) = 3 - 0 = 3 -- Не верно
4) f( -1 ) = 3 + 4 = 7 -- Верно
I hope this helps you
1) f( -2 ) = 3 + 8 = 11 -- Не верно
2) f( 1/2 ) = 3 - 2 = 1 -- Верно
3) f( 0 ) = 3 - 0 = 3 -- Не верно
4) f( -1 ) = 3 + 4 = 7 -- Верно
I hope this helps you