(4) Параметр из ЕГЭ-2014. Квадратное уравнение и перебор случаев. Разбор двух задач.
ОПЕЧАТКИ В РЕШЕНИИ:
9:25 - левая часть неравенства: “ -a^2 4a 5“ (далее решено верно)
12:36 - функция f(t)
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