19.11. Решите методом интервалов неравенство:
1) (2x – 4) (х – 6) (х – 8) 0; 2) (х + 4) (х + 1) (x-3) = 0;
3) 12х + 5) (x — 2) (x - 6) = 0; 4) (x+5) (x-1) (х - 7) < 0;
5) (х + 6) (x — 1) (х – 3,6) > 0; 6) (2x + 1) (x-1)(х-2) < 0;
7) (х - 4P (х – 3) (x + 2) = 0; 8) (x+6) (х + 1 (x-3) = 0;
9) (2x + 5) (x — 2) (x - 6 0; 10) (х + 5 (x-3y (х - 12) < 0;
11) (х + бу (х + 1) (x-3) < 0; 12) (2x + 5) (x-2y (х - 6 < 0.​
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