Question

система двух неравенств 4x-x^3>0 и x^2-8x+7>0

Answer 1

$left { {{4x-x^3 textgreater 0} atop {x^2-8x+7 textgreater 0}} right. left { {x(x^2-4) textless 0} atop {(x-1)(x-7) textgreater 0}} right. left { {{x(x-2)(x+2) textless 0} atop {(x-1)(x-7) textgreater 0}} right.$ 
xe(-∞;-2)U(0;2)
xe(-∞;1)U(7;+∞)
Ответ :(-∞;-2)U(0;1)