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b = U₂ - U₁
b = 5 - 8
b = 3
Un = a + (n - 1)b
U₁₀ = 2 + (10-1)3
U₁₀ = 2 + 9 . 3
U₁₀ = 2 + 27
U₁₀ = 29
Jadi suku ke-10 dari baris bilangan di atas adalah 29.
sn= a + (n-1)b
s10= 2+(10-1)3
s10= 2+27
=29