Найду корень уравнения: sin(pi*x/3)=-0.5
/pi*x\ sin|----| = -1/2 \ 3 /
сумма
0 - 1/2 + 7/2
=
3
произведение
1*-1/2*7/2
=
-7/4
x1 = 41.5
x2 = -42.5
x3 = -0.5
x4 = -78.5
x5 = -54.5
x6 = -38.5
x7 = 77.5
x8 = 17.5
x9 = 95.5
x10 = -36.5
x11 = 71.5
x12 = 3.5
x13 = 23.5
x14 = -32.5
x15 = 75.5
x16 = 99.5
x17 = 45.5
x18 = 15.5
x19 = -2.5
x20 = -14.5
x21 = -50.5
x22 = -68.5
x23 = 53.5
x24 = -96.5
x25 = 51.5
x26 = 21.5
x27 = 57.5
x28 = -98.5
x29 = 65.5
x30 = 27.5
x31 = 83.5
x32 = -20.5
x33 = 63.5
x34 = -26.5
x35 = -60.5
x36 = 5.5
x37 = -66.5
x38 = -62.5
x39 = 89.5
x40 = 87.5
x41 = -24.5
x42 = -8.5
x43 = 39.5
x44 = -48.5
x45 = 9.5
x46 = 29.5
x47 = 69.5
x48 = 33.5
x49 = 35.5
x50 = -72.5
x51 = 59.5
x52 = 93.5
x53 = -12.5
x54 = 81.5
x55 = -80.5
x56 = -56.5
x57 = 47.5
x58 = -74.5
x59 = 11.5
x60 = -90.5
x61 = -18.5
x62 = -6.5
x63 = -44.5
x64 = -84.5
x65 = -86.5
x66 = -92.5
x67 = -30.5