1,1\5,1\6,1\9
1.1\6.1\7,1\8
4\3,1,3\4.2\5
=26*8/125*8=208/1000=0,208
(2+i)+(3-2i)=5-i
(3+5i)*(4-i)=12-3i+20i+5=17+17i=17(1+i)
(1-i√3)*(√3+i)=√3+i-i√3*√3+√3=2√3+i-9i=2√3-8i
наверное так
1) 7 2/3 = 6 5/3
2) 15 7/9 = 14 16/9
3) 12 5/8 = 11 13/8
4) 11 2/7 = 10 9/7
5) 16 1/5 = 15 6/5
6) 3 6/7 = 2 13/7
7) 1 1/7 = 8/7
8) 1 3/5 = 8/5
9) 1 4/9= 13/9
A) 1/2
B)18c-7/c в квадрате
Г)5/8