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Verified answer
Barisan Aritmetika.5, 7, 9, 11, ...
a = 5
b = U₂ - U₁ = 7 - 5 = 2
Un = a + (n - 1)b
= 5 + (n - 1)(2)
= 2n + 3
U1=5
Un =2 n+ 3