ГДЗ по алгебре 9 класс Макарычев Задание 570

\[\boxed{\text{570}\text{\ (570)}\text{.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[\textbf{а)}\ b_{1} = 5;\ \ b_{n + 1} = b_{n} + 5\ \ \]

\[b_{2} = b_{1} + 5 = 10,\ \ \]

\[b_{3} = b_{2} + 5 = 15,\]

\[b_{4} = b_{3} + 5 = 20.\]

\[\textbf{б)}\ b_{1} = 5;b_{n + 1} = b_{n} \cdot 5\ \ \]

\[b_{2} = 5b_{1} = 25,\ \]

\[b_{3} = 5b_{2} = 125,\ \ \]

\[b_{4} = 5b_{3} = 5 \cdot 125 = 625.\]