BARISAN ARITMATIKA
40, 37, 34, 31, 28, ...., ...., ....
b = U2 - U1
b = 37 - 40
b = -3
dua suku berikutnya adalah 25, 22
28 - 3 = 25
25 - 3 = 22
Barisan yg terbentuk
40, 37, 34, 31, 28, 25, 22, ...
Semoga membantu
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