
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
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July 14th, 2019, 01:55 AM  #1 
Newbie Joined: Jul 2019 From: China Posts: 1 Thanks: 0  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.) 
July 14th, 2019, 02:54 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 21,116 Thanks: 2331 
What does "after infinite days" mean?

July 15th, 2019, 10:51 AM  #3 
Senior Member Joined: Jun 2019 From: USA Posts: 384 Thanks: 209 
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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infinite series, learn, lihua, question, words 
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