Jika a = 21 , b = -8 , Un = 5 , n = ?
Matematika
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Pertanyaan
Jika a = 21 , b = -8 , Un = 5 , n = ?
1 Jawaban
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1. Jawaban napau01
Un= a+(n-1)b
= 21+(n-1)×(-8) = 5
= 21+8n+8=5
=29+8n=5
8n=24
n=3