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Un = a + (n - 1) b
U55 = 7 + (55 -1) 8
U55 = 7 + 54 x 8
U55 = 7 + 432
U55 = 439
2) selisih = (7-5) / (7+5) = 2/12 x 48 = 2 x 4 = 8 ⇒ (A)
4) Un = a + (n-1) b
U55 = 7 + (55 - 1) 8
U55 = 7 + 54 x 8
U55 = 7 + 432
U55 = 439
maaf kalo salah, semoga membantu
tolong jadikan jawaban terbaik
(maaf nomer 5 dan 3 nggak bisa)