Penjelasan dengan langkah-langkah:
2 + 5 + 8 + ...
suku pertama (a) = 2
beda (b) = 3
jumlah 20 suku pertama
Sn = n/2 (2a + (n - 1) . b)
S20 = 20/2 (2 . 2 + (20 - 1) . 3)
S20 = 10 (4 + 57)
S20 = 610
Jawaban:
35
y47gtig4 x 12f %14 2+5+8+20=35
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Penjelasan dengan langkah-langkah:
2 + 5 + 8 + ...
suku pertama (a) = 2
beda (b) = 3
jumlah 20 suku pertama
Sn = n/2 (2a + (n - 1) . b)
S20 = 20/2 (2 . 2 + (20 - 1) . 3)
S20 = 10 (4 + 57)
S20 = 610
Jawaban:
35
Penjelasan dengan langkah-langkah:
y47gtig4 x 12f %14 2+5+8+20=35