\[\boxed{\text{1161\ (1161).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ \frac{1}{2}a^{6} - \frac{1}{4}a^{2}b =\]
\[= \frac{1}{2}a^{2} \cdot \left( a^{4} - \frac{1}{2}b \right)\]
\[2)\ 5m^{2}n^{3}k^{4} + 35m^{4}n^{3}k^{2} =\]
\[= 5m^{2}n^{3}k^{2} \cdot \left( k^{2} + 7m^{2} \right)\]
\[3)\ x^{3}y^{2}z^{5} - 2xy^{5}z^{3} + 3x^{2}y^{3}z =\]
\[= xy^{2}z \cdot \left( x^{2}z^{4} - 2y^{3}z^{2} + 3xy \right)\]
\[4)\ a^{2n}b^{3n} - a^{n}b^{4n} =\]
\[= a^{n}b^{3n} \cdot \left( a^{4} - b^{n} \right)\ \]
\[\boxed{\text{1161.\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\text{M\ }(1;4)\]
\[1)\ 4y - 2x = - 4\]
\[4 \cdot 4 - 2 \cdot 1 = - 4\]
\[16 - 2 = - 4\]
\[14 \neq - 4 \Longrightarrow не\ принадлежит.\]
\[2)\ 6x + 11y = 50\]
\[6 \cdot 1 + 11 \cdot 4 = 50\]
\[6 + 44 = 50\]
\[50 = 50 \Longrightarrow принадлежит.\]