\[\boxed{\text{841\ (841).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[\textbf{а)}\ C_{24}^{2} = \frac{24!}{2! \cdot 22!} = \frac{23 \cdot 24}{2} = 276.\]
\[\textbf{б)}\ A_{24}^{2} = \frac{24!}{22!} = 23 \cdot 24 = 552.\]
\[\boxed{\text{841.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[\textbf{а)}\ y = 2x² - 3|x| - 2\ \]
\[\textbf{б)}\ y = \left| \frac{1}{2}x^{2} - x \right| - 4\]