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a) beda (b)
Un = a + (n - 1) b
U₁₀ = 6 + (10 -1) b
69 = 6 + 9b
69 - 6 = 9b
63 = 9b
7 = beda
b) Rumus suku ke n
Un = a + (n - 1) b
Un = 6 + (n - 1) 7
Un = 6 + 7n - 7
Un = -1 + 7n
c) U₁₀₁
Un = -1 + 7n
U₁₀₁ = -1 + 7(101)
U₁₀₁ = -1 + 707
U₁₀₁ = 706
5. U₁ = a = 8 . beda = 8
S₁₀₀ = ?
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