[理工] 組合

看板Grad-ProbAsk作者 (DaiJouBu)時間11年前 (2012/09/19 14:18), 編輯推噓1(1推 0噓 7→)
留言8則, 3人參與, 最新討論串1/1
請教1題。 n n n n n n n n n 2( )+( )+2( )+( )+2( )+( )+.....2( )+( )+2( ) 0 1 2 3 4 5 n-2 n-1 n 這一題該如何算… -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.118.254.119
推
09/19 14:29, , 1F
(3/2)*2^n
09/19 14:29, 1F
→
09/19 15:27, , 2F
n n n
09/19 15:27, 2F
→
09/19 15:28, , 3F
( ) + ( ) + ..... .+ ( ) = (1+1)^n
09/19 15:28, 3F
→
09/19 15:28, , 4F
0 1 n
09/19 15:28, 4F
→
09/19 15:28, , 5F
n n n
09/19 15:28, 5F
→
09/19 15:28, , 6F
( ) - ( ) + ..+(-1)^n( ) = (1-1)^n
09/19 15:28, 6F
→
09/19 15:29, , 7F
0 1 n
09/19 15:29, 7F
→
09/19 22:48, , 8F
感謝
09/19 22:48, 8F
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