Penjelasan dengan langkah-langkah:
11 + 16 + 21 + ....
suku pertama (a) = 11
beda (b) = 5
jumlah 10 suku pertama
Sn = n/2 (2a + (n - 1) . b)
S10 = 10/2 (2 . 11 + (10 - 1) . 5)
S10 = 5 (22 + 45)
S10 = 335
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Penjelasan dengan langkah-langkah:
11 + 16 + 21 + ....
suku pertama (a) = 11
beda (b) = 5
jumlah 10 suku pertama
Sn = n/2 (2a + (n - 1) . b)
S10 = 10/2 (2 . 11 + (10 - 1) . 5)
S10 = 5 (22 + 45)
S10 = 335