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habis dibagi 6
tidak habis dibagi 8
Irisan = habis dibagi 6 dan tidak habis dibagi 8
awal = 12
Un = 99
beda = 6
Un = a + (n - 1)b
99 = 12 + (n - 1)6
99 = 12 + 6n - 6
99 = 6 + 6n
6n = 99 - 6
6n = 93
n = 15,5
bulatkan ke bawah,
n = 15
ada 15 bilangan yang habis dibagi 6
awal = 10
beda = 8
Un = 99
Un = a + (n - 1)b
99 = 16 + (n - 1)8
99 = 16 + 8n - 8
99 = 8 + 8n
8n = 99 - 8
8n = 91
n = 11,375
bulatkan ke bawah
n = 11
banyaknya bilangan yang tidak habis dibagi 8 = 90 - 11
= 79
Banyaknya bilangan = 15 + 79
= 94
Bilangan kelipatan 6 = 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, 96
Bilangan yang tidak habis dibagi 8 = 12, 18, 30, 36, 42, 54, 60, 66, 78, 84, 90 = 11 bilangan
jumlah bilangan yang habis dibagi 6 atau tidak habis dibagi 8 = 94 - 11
= 83
Kalau mau tau bilangan bilangannya :
10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99