Sisipkan 5 suku geometri diantara 81/2 dan -16/3

jawab
81/2 , -16/3

r1 = (-16/3 ) : (81/2) = - (32/243)
sisipan 4 suku --> k = 4

r2 = ⁴⁺¹√r1 = ⁵√ (-32/243) = ⁵√ (-2/3)⁵
r2 = -2/3

barisan geo metri  baru 
= 81/2 , -27, 18, - 12, 8, -16/3