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Diperoleh persamaannya :
U1 + U10+ U19= 96 ⇒ a + a + 9b + a + 18b = 96
⇒ 3a + 27b = 96
⇒ a + 9b = 32 Suku ke-10 barisan aritmatika tersebut ialah =>
U10= a + 9b ⇒ U10= a + 9b = 32
a + a+9b+a+18b = 96
3a+27b = 96
3(a+9b) = 96
a + 9b = 32
U10 = 32