Question

398 пример 2и4 жду уже 2 дня. даю 25 ьалов

Answer 1

$2); (2,5-x)(frac{1}{3}+x)(x+1) textgreater 0\\(x-2,5)(x+frac{1}{3})(x+1) textless 0\\---(-1)+++(frac{1}{3})---(2,5)+++\\xin (-infty ;-1)cup (frac{1}{3};; 2,5)\\4); ; x(x+frac{7}{8})(x-frac{1}{9}) textgreater 0$

$---(-frac{7}{8})+++(0)---(frac{1}{9})+++\\xin (-frac{7}{8};0)cup (frac{1}{9};+infty )$