求 1*1/3+1/3*1/5+1/5*1/7+1/7*1/9...........+1/97*1/99=?
拜託請寫詳細計算方法
2006-09-18 20:39:38 · 4 個解答 · 發問者 靜宜 1 in 電腦與網際網路 ➔ 程式設計
1*1/3+1/3*1/5+1/5*1/7+1/7*1/9...........+1/97*1/99
把1*1/3化為(1/1-1/3)*1/2
把1/3*1/5化為(1/3-1/5)*1/2
把1/5*1/7化為(1/5-1/7)*1/2,以此類推,所以原式化為
=(1/1-1/3+1/3-1/5+1/5-1/7+.........+1/97-1/99)*1/2
=(1-1/99)*1/2
=(98/99)*1/2
=49/99
=0.49494949............
2006-09-23 18:19:26 · answer #1 · answered by ? 2 · 0⤊ 0⤋
太深奧了,無法理解啊!
2011-03-11 14:02:59 · answer #2 · answered by 傀儡世界 2 · 0⤊ 0⤋
我先跟你講*這個代表乘0.895
和這個/是代表除62.5
所以答案事-495.861
2006-09-23 13:17:04 · answer #3 · answered by 魷魚 6 · 0⤊ 0⤋
Private Sub Command1_Click() For i = 1 To 97 Step 2 Sum = Sum + ((1 / i) * (1 / (i + 2))) Next Print SumEnd Sub
2006-09-24 00:07:28 補充:
既然是數學,貼來Visual Basic 板 ?
2006-09-24 00:21:18 補充:
很抱歉,我對您的那句話很感冒
請恕我給予負評
2006-09-19 06:34:16 · answer #4 · answered by ? 6 · 0⤊ 0⤋