1/3:21/5<span>+1,4х=5/7:9/5-0,6х
5/63+1,4х=25/63-0,6х
1,4х+0,6х=25/63-5/63
2х=20/63
х=20/126=10/63</span>
4х+3у-24=0
5х-у=11
-у=11-5х
У=-11+5х
4х-33+15х-24=0
19х=57
Х=3
У=-11+15
У=4
Ответ:
Х=3
У=4
<span>b1=2
b2=8
q=b2/b1=8/2=4
Сумма = (b1(q^5-1))/(q-1)=(2(1024-1))/3 = (2*1023)/3=2*341=682
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