1). b1= -32 , q= 1\2 ,
b3 = b1*q² = -32*(1/4) = -8
b6 = b1*q⁵ = -32*(1/32) = -1
2). Если а1= -0.001 и q=10,то
a4=a1*q³ = -0.001*1000 = -1
a7= a1*q⁶ = -0.001*1000000 = -1000
