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Verified answer
Baris Aritmatikab = (U₁₀ - U₄) / (10 - 4)
b = (38 - 14) / 6
b = 24 / 6
b = 4
U₁₀ = a + 9b
38 = a + 9(4)
38 - 36 = a
a = 2
Maka
U₂₀ = a + 19b
U₂₀ = 2 + 19(4)
U₂₀ = 2 + 76
U₂₀ = 78