Ответ:
А⋂(0;7] = {1/3}.
Пошаговое объяснение:
3x² + 5x - 2 = 0
D = 25 - 4•3•(-2) = 49
x1 = (-5+7)/6 = 2/6 = 1/3;
x2 = (-5-7)/6 = -12/6 = -2.
2. A = {-2; 1/3},
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Ответ:
А⋂(0;7] = {1/3}.
Пошаговое объяснение:
3x² + 5x - 2 = 0
D = 25 - 4•3•(-2) = 49
x1 = (-5+7)/6 = 2/6 = 1/3;
x2 = (-5-7)/6 = -12/6 = -2.
2. A = {-2; 1/3},
А⋂(0;7] = {1/3}.