<span>-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,всего 20 целых чисел,их сумма равна -10</span>
14000:50=7000
19590:30=653
12880:20=644
18200:40=455
45120:60=752
29960:70=428
А) 1/2 - 2/1
1/3 - 3/1
2/5 - 5/2
5/3 - 3/5
б)5/6 - 6/5
6/5 - 5/6
3/1 - 1/3
8/1 - 1/8
в)2 - 1/2
3 - 1/3
4 - 1/4
<span>1 - 1</span>
6x=arccos1/2+2πn
6x=π/3+2πn
x=π/18+πn/3