In the parallelogram ABCD, e is on DC, if de: EC = 1:2, then BF: be=______ .
∵ de: EC = 1:2 ∵ EC: CD = 2:3, namely EC: ab = 2:3 ∵ ab ∥ CD, ∵ Abf ∥ CEF, ∥ BF: EF = AB: EC = 3:2. ∥ BF: be = 3:5
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