b1 = 512; bn = 1; Sn = 1023;
Sn = (bn · q - b1)/(q - 1)
1023 = (q - 512)/(q - 1)
1023q - 1023 = q - 512
1022q = 511
q = 1/2
bn = b1 · q^(n - 1) 1 = 512 · (1/2)^(n -1) 1/512 = 1/2^(n - 1)
1/2^9 = 1/2^(n - 1)
9 = n - 1
n = 10
Ответ: n = 10; q = 1/2
<span>3√49 * 3√112 / 3√250=3*7*</span>√112/250=21*√56/125=21*√(4*14/5*25)=21*2/5*√14/5=42/5*√14/5
1.5b-20+4x-xb
2.ab+b-a-1
3.abc+8bc
4.25ab+6ap
6,1<√38<6,2
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