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Rumus suku ke-n
Un = 5n - 3
Ditanya :
Nilai U7 - U5 ?
Jawab :
U7 = 5 (7) - 3 = 35 - 3 = 32
U5 = 5 (5) - 3 = 25 - 3 = 22
Maka hasil dari U7 - U5 = 32 - 22 = 10.
Semoga membantu.