sistemi lineynix neravenstv s odnim neizvestnim

sistemi lineynix neravenstv s odnim neizvestnim. sistemi lineynix neravenstv s odnim neizvestnim. avtor eremeeva elena borisovna uchitel matematiki mbou oosh №26, g. engelsa ustniy schyot. 1.nazovite obshee reshenie 4 -2 0 -5 2. reshite neravenstva: a) 3x > 15 b) -5x ≤ -15 3. kakim znakom sravneniya pokazivayut polojitelnie chisla? yavlyaetsya li resheniem sistemi neravenstv chislo, ukazannoe v skobkax? 2x + 3 > 0, ( -1) 7 – 4x > 0. reshenie: podstavim v sistemu chislo -1 vmesto peremennoy x. 2•(-1) + 3 > 0, -2 + 3 > 0, 1 > 0, verno 7 – 4•(-1) > 0; 7 + 4 > 0; 11 > 0. verno otvet: chislo -1 yavlyaetsya resheniem sistemi. trenirovochnoe zadanie № 53 (b) 5x …

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