\[\boxed{\text{985\ (985).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[ax - 3y = 12;\ \ (0;0)\]
\[0 \cdot a - 0 = 12\ \]
\[0 \neq 12 \Longrightarrow\]
\[\Longrightarrow не\ существует\ такого\ a.\]
\[\boxed{\text{985.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = x^{2} + x + 1\]
\[x\] | \[- 3\] | \[- 2\] | \[- 1\] | \[0\] | \[1\] | \[2\] | \[4\] | \[7\] |
---|---|---|---|---|---|---|---|---|
\[y\] | \[7\] | \[3\] | \[1\] | \[1\] | \[3\] | \[7\] | \[21\] | \[57\] |
\[y( - 3) = 9 - 3 + 1 = 7\]
\[y( - 2) = 4 - 2 + 1 = 3\]
\[y( - 1) = 1 - 1 + 1 = 1\]
\[y(0) = 0 + 0 + 1 = 1\]
\[y(1) = 1 + 1 + 1 = 3\]
\[y(2) = 4 + 2 + 1 = 7\]
\[y(4) = 16 + 4 + 1 = 21\]
\[y(7) = 49 + 7 + 1 = 57\]