u 1 = 10 u4=80. U5=...
Matematika
dahlan23
Pertanyaan
u 1 = 10 u4=80. U5=...
1 Jawaban
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1. Jawaban azizcahpangenp5l5t3
U1 = 10 => a= 10
U4 = 80 => ar^3 = 80
10r^3 = 80
r^3 =8
r = 2
Un = 10. 2^n-1
U5 = 10. 2^4
= 10. 16
= 160