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✨ Jawaban Terbaik ✨

OB₁ : B₁B = OA₁ : A₁A = 6:2 = 3:1
OA₁ : A₁A = OB₂ : B₂B₁ = 3:1
所以OB₂ = 6*(3/4) = 9/2,B₂B₁ = 3/2
OB₂ : B₂B₁ = OA₂ : A₂A₁ = (9/2):(3/2) = 3:1 = OB₃ :B₃B₂
OB₃ = (9/2)*(3/4) = 27/8

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