Question

геометрична прогресія​

Answer 1

Ответ:

2)q=20:5=4

b3=b1×q^(3-1)=5×4^2=80

1)q= -20:(-4) =5

b3=b2×q= -20×5 = -100

3)b2=b1×q=18

b3=b2×q=54

b4=b3×q=162

4)q= 10:(-1)= -10

b3=b2×q= -100

Answer 2

1) b₁=-4; b₂=-20

q=b₂/b₁=-20/(-4) =5

b₃=b₂*q= -20*5 = -100

2)q=20/5=4

b₃=b₁*q²=5*16=80

3)b₁=6 ;q=3;

b₂=b₁*q=6-3=18

b₃=b₂*q=18*3=54

b₄=b₃*q=54*3=162

4) b₁=-1; b₂=10;

q= 10/(-1)= -10;

b₃=b₂*q= 10*(-10)=-100