Jawab:
140
Penjelasan dengan langkah-langkah:
a = 20 + 10 = 30 (bulan pertama)
b = 10
1 tahun = 12 bulan
U12 = a + (12-1) b
= 30 + 11 x 10
= 30 +110
= 14 0
atau
20 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 140
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Jawab:
140
Penjelasan dengan langkah-langkah:
a = 20 + 10 = 30 (bulan pertama)
b = 10
1 tahun = 12 bulan
U12 = a + (12-1) b
= 30 + 11 x 10
= 30 +110
= 14 0
atau
20 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 140