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Induction help please please November 06, 2007 09:39AM |
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Re: Induction help please please November 06, 2007 12:48PM |
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Re: Induction help please please November 06, 2007 12:58PM |
Registered: 17 years ago Posts: 308 Rating: 0 |
Re: Induction help please please November 06, 2007 01:03PM |
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Re: Induction help please please November 06, 2007 01:05PM |
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Anonymous User
Re: Induction help please please November 09, 2007 11:25AM |
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hypothesis: 2n - 3 <= 2^(n - 2) base case: check validity for n = 5 2(5) - 3 <= 2^(5 - 2) 7 <= 8 yay. base case checks out. by induction, assume that the hypothesis for n - 1 is correct then for n you have: 2(n - 1) - 3 <= 2^(n - 1 - 2) //hypothesis - 1 2n - 5 <= 2^(n - 3) //simplify 2n - 3 <= 2^(n - 3) + 2 //add 2 to each side <= 2^(n - 2) //which was required to prove
Re: Induction help please please November 09, 2007 11:31AM |
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Anonymous User
Re: Induction help please please November 09, 2007 11:44AM |
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# Induction is the tool for proving an infinite set of related facts. 1. Prove one fact (basis step). 2. Show how the truth of the fact for any value of n immediately implies the truth of the fact for the value n + 1 (inductive step). * Break the inductive step into 3 carefully labeled sections. 1. Inductive hypothesis: the fact for value n that you will assume to be true. 2. Statement to be proven: the fact for value n+1 that you will prove to be true (very similar in form to the inductive hypothesis). 3. Proof of inductive step: The proof that the inductive hypothesis implies the truth of the statement to be proven. * In this way, we can prove an infinite set of facts in a finite amount of time.
2(n + 1) - 3 <= 2^(n + 1 - 2) //hypothesis + 1 2n - 1 <= 2^(n - 1) //simplify 2n - 3 <= 2^(n - 1) - 2 //subtract 2 from each side <= 2^(n - 2) //which was required to prove
Re: Induction help please please November 09, 2007 11:47AM |
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Anonymous User
Re: Induction help please please November 09, 2007 11:47AM |
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Re: Induction help please please November 09, 2007 12:01PM |
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Re: Induction help please please November 09, 2007 12:01PM |
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Re: Induction help please please November 09, 2007 12:02PM |
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Re: Induction help please please November 09, 2007 12:16PM |
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Re: Induction help please please November 09, 2007 12:18PM |
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Re: Induction help please please November 09, 2007 12:33PM |
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Re: Induction help please please November 09, 2007 12:37PM |
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Re: Induction help please please November 09, 2007 12:37PM |
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Re: Induction help please please November 09, 2007 01:06PM |
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Re: Induction help please please November 09, 2007 01:14PM |
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Re: Induction help please please November 09, 2007 01:15PM |
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Re: Induction help please please November 09, 2007 01:26PM |
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Re: Induction help please please November 09, 2007 01:38PM |
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Re: Induction help please please November 10, 2007 08:39AM |
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