Ответы на вопрос:
ответ: =, =-1
3x+(2-x) (4+3x) = 0
3x+8+6x-4x-3=0
5x+8-3=0
-3+5x+8=0
3-5x-8=0
D=-4ac
D=25-4×3×(-8)=121
=
=
=-1
{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
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