|-25|=25
|-16|=16
<span> - 2,05+|-25|:|-16| = -2,05+25:16 = -2,05+1,5625 = -0,4875
Ответ: </span>-0,4875
{b1q³+b1=7/16⇒b1*(q³+1)=7/16⇒b1=7/[16(q³+1)]
{b1q²-b1q+b1=7/8⇒b1*(q²-q+1)=7/8⇒b1=7/[8(g²-q+1)]
7/[16(q³+1)]=7/[8(g²-q+1)]
7/[16(q+1)(q²-q+1)]=7/[8(q²-q+1)]
1/[2(q+1)=1
2(q+1)=1
q+1=1/2
q=-1/2
b1=7:16(-1/2+1)=7:(16*1/2)=7/8