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Verified answer
Semoga bermanfaat ...Mapel : Matematika
Bab : Barisan dan Deret Bilangan
Indikator : Suku Ke-N Barisan Aritmatika
Langkah Penyelesaian dan Jawaban :
U3 = 18
U12 = 36
U20 = ?
b = (36 - 18) / (12 - 3)
b = 18/9
b = 2
U20 = 2(20 - 3) + 18
U20 = 34 + 18
U20 = 52