(a) Prove, by MI that n(n+1) is divisible by 2 for all positive integers n.
(b) Using the result of (a), prove by MI that n^3 + 5n is divisible by 6 for all positive integers n.
Only have to do (b) part, part (a) has been proved.
Induction
2010-04-17 11:17 pm
回答 (1)
2010-04-17 11:25 pm
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2010-04-17 15:25:39 補充：
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