Jumlah tah hingga deret geometri 81+27+9+3
Matematika
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Jumlah tah hingga deret geometri 81+27+9+3
1 Jawaban
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1. Jawaban Anonyme
Kelas 8 Matematika
Bab Barisan dan Deret Bilangan
r = U2/U1
r = 27/81
r = 1/3
S∞ = a/(1 - r)
S∞ = 81/(3/3 - 1/3)
S∞ = 81/(2/3)
S∞ = 81 . 3/2
S∞ = 243/2
S∞ = 121 1/2