mohon di bantu. udah pusing ni pala
Matematika
rhifen14
Pertanyaan
mohon di bantu. udah pusing ni pala
2 Jawaban
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1. Jawaban nasril8
Sn = n/2 { 2a + (n-1)b }
168 = 12/2 { 2a + (12-1).2 }
168 = 6 ( 2a + 22 )
2a + 22 = 168/6
2a + 22 = 28
a + 11 = 14
a = 14 - 11
a = 3 -
2. Jawaban johanpro17
Sn = n/2 { 2a + (n-1)b }
168 = 12/2 { 2a + (12-1).2 }
168 = 6 ( 2a + 22 )
2a + 22 = 168/6
2a + 22 = 28
a + 11 = 14
a = 14 - 11
a = 3