三、 Solve the recurrence relation an = = 1 and a₁ = 2.

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Aaron Lim

詳解 #6615218

2025/08/20

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四、Suppose that a spam filter is trained from 7500 messages, where 5000 messages among them are spam. The word "surprise" appears in 750 spam messages and 10 non-spam messages, and the word "energy" appears in 400 spam messages and 100 non-spam messages. What is the probability that an incoming message is considered spam by the filter if it contains both the words "surprise" and "energy"?

三、 Solve the recurrence relation an = = 1 and a₁ = 2.

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