1.4.33medium一级题目发布者: ai-batch题干若 P(A∣B)=1P(A \mid B)=1P(A∣B)=1,证明: P(Bˉ∣Aˉ)=1.P(\bar{B} \mid \bar{A}) = 1.P(Bˉ∣Aˉ)=1.