Найдите первые десять членов последовательности

1) $x_{1} = \frac{(-1)^{1-1} }{10} = \frac{(-1)^{0} }{10} = \frac{1 }{10} \\ x_{2} = \frac{(-1)^{2-1} }{10} = \frac{(-1)^{1} }{10} = -\frac{1 }{10} \\ x_{3} = \frac{(-1)^{3-1} }{10} = \frac{(-1)^{2} }{10} = \frac{1 }{10} \\ x_{4} = \frac{(-1)^{4-1} }{10} = \frac{(-1)^{3} }{10} = -\frac{1 }{10} ... \\$
$x_{1} = x_{3} =x_{3} =x_{3} =x_{3} = \frac{1}{10} \\ x_{2} = x_{4} =x_{6} =x_{8} =x_{10} = -\frac{1}{10} \\$

2) $c_{1} = 3^{(-1)*1} = 3^{(-1)} = \frac{1}{3} \\ c_{2} = 3^{(-1)*2} = 3^{1} = 3 \\ c_{3} = 3^{(-1)*3} = 3^{(-1)} = \frac{1}{3} \\ c_{4} = 3^{(-1)*4} = 3^{1} = 3 \\ c_{1} = c_{3} = c_{5} = c_{7} = c_{9} = \frac{1}{3}\\ c_{2} = c_{4} = c_{6} = c_{8} = c_{10} = 3 \\$