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struktur 9 suku pertama = 9a + 36b = 288 ⇒ pers.2
kali 10/9 pers2
10a + 45b = 345 10a + 45b = 345
10a + 40b = 320 _ 10a = 345 - 225
5b = 25 a = 12
b = 5
suku ke 10 = a + 9b
= 12 + 45
= 57
kalo ada yang tau : brainly.co.id/tugas/1600931