Geometri a=5r=3dit U6?a=4r=-2dit U12?​

Jawab:
[1.]  U₆ = 1.215
[2]  U₁₂ = -8.192

Penjelasan dengan langkah-langkah:
Geometri
Un = arⁿ⁻¹

[1.] a = 5, r = 3, n = 6
Un = arⁿ⁻¹   U₆ = 5(3)⁶⁻¹
U₆ = 5(3)⁵   U₆ = 5(243)
U₆ = 1.215

[2] a = 4, r = -2, n = 12
Un = arⁿ⁻¹   U₁₂ = 4(-2)¹²⁻¹
U₁₂ = 4(-2)¹¹ U₁₂ = 4(-2.048)
U₁₂ = -8.192

(xcvi)

Penjelasan dengan langkah-langkah:

jawaban dan cara terlampir