mathematical induction (1)
2010-08-17 5:56 am
Prove, by mathematical induction, that for all positive integers n, 1 + 2 + 3 + 4 + . . . + 2 ^( n - 1 ) = 2 ^( 2 n - 3 ) + 2 ^( n - 2 ) .
回答 (1)
2010-08-17 6:52 am
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2010-08-16 22:52:25 補充：
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