Х(х-1)(х+2)(х+3)>0(x^2 - x)(x^2 + 3x + 2x + 6)>0
(x^2 - x)(x^2 + 5x + 6)>0
x^2 - x = 0
x^2 = x
x=1 x=0
x^2 + 5x + 6 = 0
D = 25 - 24 = 1
x = (-5 - 1)\2 = -6\2 = -3
x= (-5 + 1)\2 = -4\2 = -2
+ - + - +
----- • ---- • ----------- • --------- • ----->x
-3 -2 0 1
Ответ: (-∞ ; -3)(-2;0)(1; +<span>∞)</span>
А) 12 21 13 31 14 41 15 51 16 61 17 71 18 81 19 91
23 24 25 26 27 28 29 21 32 31 34 35 36 37 38 39 41 42 43 44 45 46 47 48 49 51 52 53 54 55 56 57 58 59 61 61 63 64 65 66 67 68 69
A)- 322 |_46___ б) 426 |_71___ в) 64,6 |_34___
322 | 7 426 6 34 19
0 0 ________
306
306
0
Все числа , кроме 0 и 1
2×1=2
3×1=3
MN = x (6.8)
MK = 2x (13.6)
NK = 2x+4 (17.6)
x+2x+2x+4 = 38
5x = 34
x = 6,8