Penjelasan dengan langkah-langkah:
baris 1 (a)= 8
b = 3
u6 = a + (n-1) b
= 8 + 5(3)
= 8 + 15
= 23
jikas 2 baris terakhir tidak terisi (baris 8 dan 9)
jumlah 7 baris
u7 = 8 +6(3)
= 8+18
= 26
S7 = n/2 (a +u7)
= 7/2 (8+26)
= 7/2(34)
= 7 x 17
= 119 tiket
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Penjelasan dengan langkah-langkah:
baris 1 (a)= 8
b = 3
u6 = a + (n-1) b
= 8 + 5(3)
= 8 + 15
= 23
jikas 2 baris terakhir tidak terisi (baris 8 dan 9)
jumlah 7 baris
u7 = 8 +6(3)
= 8+18
= 26
S7 = n/2 (a +u7)
= 7/2 (8+26)
= 7/2(34)
= 7 x 17
= 119 tiket