6,10,14,18,22,... Tentukan S20 =...
Matematika
Otaku9
Pertanyaan
6,10,14,18,22,...
Tentukan S20 =...
Tentukan S20 =...
1 Jawaban
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1. Jawaban BSunShine
Materi : Barisan dan Deret
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6 , 10 , 14 , 18 , 22 , ... ,...
Sn = n/2 ( 2.a + (n - 1) b)
S20 = 20/2 ( 2.6 + (20 - 1) 4)
S20 = 10 ( 12 + (19)4)
S20 = 10 ( 12 + 76 )
S20 = 10 ( 88 )
S20 = 880
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