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July 14th, 2019, 01:55 AM   #1
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LiHua learn words question

LiHua learn 1 new word everyday and review it after learning 1,2,4,8...2^n days.
questions:
1.After infinite days, does LiHua need to review infinite word?
2.How arrange review plan, can LiHua just need to review finite words after infinite days.Or can she do it?
(Condition:she must review infinitely many times after infinite days.)
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July 14th, 2019, 02:54 AM   #2
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What does "after infinite days" mean?
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July 15th, 2019, 10:51 AM   #3
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It sounds like they're basically asking if an infinite sum converges, except a little inverted.

I don't quite understand the rules, though. Is it something like this?
Day 1: Learn "rat"
Day 2: Learn "ox," review "rat" (1 day later)
Day 3: Learn "tiger"
Day 4: Learn "rabbit," review "ox" (2 days later)

Day 7: Learn "horse," review "tiger" (4 days later)

Day 12: Learn "pig," review "rabbit" (8 days later)
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