Question

Помогите мне решить пример, пожалуйста ​

Answer 1

$\displaystyle\bf\\\Big(\frac{2}{13} \Big)^{x^{2} -1} \geq 1\\\\\\\Big(\frac{2}{13} \Big)^{x^{2} -1} \geq \Big(\frac{2}{13} \Big)^{0} \\\\\\0 < \frac{2}{13} < 1 \ \ \ \Rightarrow \ \ \ x^{2} -1\leq 0\\\\\\(x-1)\cdot(x+1)\leq 0\\\\\\+ + + + + \Big[-1\Big]- - - - - \Big[1\Big]+ + + + + \\\\\\Otvet \ : \ x\in\Big[-1 \ ; \ 1\Big]$