Question

Помогите номер 4 срочно

Answer 1

$\frac{0,8x-2}{ x^{2} +1}\ \textless \ 0$

$x^{2} +1\ \textgreater \ 0$ При любых  х

$0,8x-2\ \textless \ 0$

$0.8x\ \textless \ 2$

$x\ \textless \ 2.5$
ответ $(-oo; 2.5)$

2) $I2x-3I\ \textgreater \ 1$

a) $2x-3\ \textgreater \ 1$

$2x\ \textgreater \ 4$

$x\ \textgreater \ 2$

b) $3-2x\ \textgreater \ 1$

$2\ \textgreater \ 2x$

$1\ \textgreater \ x$

Ответ $(-oo; 1) (2; +oo)$