2. 5/7= 19/7= 19^2/7^2=361/49=7 целых 18/49
1)14
2)6,8,10,12,14,16,18,20,22,24,26,28
3)66,68,70
<span>X : 7 +28/113 = 43/113
х/7=43/113-28/113
х/7=43-28/113
х/7=15/113
х=15/113*7/1=15/113*791/113=15*791/113=11865/113
х=105
ПРОВЕРКА:
105 : 7 +28/113=43/113
</span>
А) I-2I=2; I5I=5; I14I=14; I-56I=56; I100I=100; I-420I=420;
б)I4,2I=4,2; I-7,3I=7,3; I-11,5I=11,5; I16,2I=16,2; I-20,7I=20,7;
в) I- 1/3I=1/3; I5/9I=5/9; I-1 5/6I=1 5/6; I3 1/7I=3 1/7; I-8 3/11I=8 3/11; I4 3/8I=4 3/8;