Question

Геометрическая прогрессия
b1=81, q= -1/3
Сравните b4 и b6

Answer 1

b1=81,q=-1/3
b4=b1.qˇ3,b4=81.(-1/3)ˇ3=81.(-1/27)=-3
b6=b1.qˇ5,b6=81.(-1/3)ˇ5=81.(-1/243)=-1/3
 b4 na 9 raz menše .