1000 1001 1002 9997 9998 9999
10000 10001 10002 99997 99998 99999
<span>100001 100002 100003 999997 999998 999999
</span>
Ответ:
1) 9 и 7
2) 5 и 17
Пошаговое объяснение:
1) 63=9·7 и так как 7 простое число, то пара чисел 9 и 7 взаимно простые
2) 85=5·17 и оба числа 5 и 17 простые числа, тогда пара чисел 5 и 17 взаимно простые
1/x+1-2/x-2+3/x²-1=1/x-2/x-2+3/x²=-1/x+3/x²-2=3/x²-1/x-2=3/xx-1x/xx-2=3-1x/xx-2
В итоге будет: 3-1x/x²-2
№420.
а) 2/9 : 5 = 2/9 : 5/1 = 2/9 * 1/5 = 2/45
б) 18/23 : 2 = 18/23 : 2/1 = 18/23 * 1/2 = 9/23
в) 22/7 : 8 = 22/7 : 8/1 = 22/7 * 1/8 = 22/56 = 11/28
г) 24/35 : 16 = 24/35 : 16/1 = 24/35 * 1/16 = 3/70
д) с/d : n = c/d : n/1 = c/d * 1/n = c/dn
№421.
а) 1 5/11 : 8/17 = 16/11 : 8/17 = 16/11 * 17/8 = 34/11 = 3 1/11
б) 18/25 : 2 2/5 = 18/25 : 12/5 = 18/25 * 5/12 = 3/10
в) 5 1/3 : 6 2/3 = 16/3 : 20/3 = 16/3 * 3/20 = 16/20 = 4/5
г) 7 5/7 : 4 2/7 = 54/7 : 30/7 = 54/7 * 7/30 = 54/30 = 1 24/30 = 1 4/5
д) 56 : 4 4/5 = 56/1 : 24/5 = 56/1 * 5/24 = 35/3 = 11 2/3
е) 12 3/5 : 9 = 63/5 : 9/1 = 63/5 * 1/9 = 7/5 = 1 2/5
ж) 27 6/7 : 3 = 195/7 : 3/1 = 195/7 * 1/3 = 65/7 =
9 2/7
з) 40 15/17 : 5 = 695/17 : 5/1 = 695/17 * 1/5 = 139/17 = 8 3/17
и) 9 1/8 : 9 1/8 = 1
к) 0 : 3 4/13 = 0
№424.
1) 2 1/4 + 8 3/4 : 6 2/3 = 2 1/4 + 35/4 : 20/3 =
2 1/4 + 35/4 * 3/20 = 2 1/4 + (7*3)/(4*4) = 2 1/4 + 21/16 = 2 1/4 + 1 5/16 = 2 4/16 + 1 5/16 = 3 9/16
2) (1 1/3)^2 * (1 1/2)^3 : 2 2/5 = (4/3)^2 * (3/2)^3 : 2 2/5 = 16/9 * 27/8 : 12/5 = 6/2 : 12/5 = 6/2 * 5/12 = 5/4 = 1 1/4
3) (1 1/2 - 3/4) * (5 - 1 2/3) : 3 1/8
Решаем по действиям:
1) 1 1/2 - 3/4 = 3/2 - 3/4 = 6/4 - 3/4 = 3/4
2) 5 - 1 2/3 = 4 3/3 - 1 2/3 = 3 1/3
3) 3/4 * 3 1/3 = 3/4 * 10/3 = 10/4
4) 10/4 : 3 1/8 = 10/4 : 25/8 = 10/4 * 8/25 = 2/10
Ответ: 2/10
1) -2+2/4+(-2*3)-1/3-2-2/2= -2+2/4-6-1/3-2-1=-11+2/4-1/3=-11+1/2-1/3=-66/6+3/6-2/6=-65/6=-10 5/6
2)2*(-3)+3/4-3-1/2+3/4=-6+3/4-3-1/2+3/4=-9+6/4-1/2=-9+6/4-2/4=-9+4/4=-8
3)4*5-1/3-2*5+3/6-1/6=20-1/3-10+2/6=10-2/6+2/6=10
