1x3x5x7x9x...x97x99=??

1x3x5x7x9x...x97x99
= (1 x 2 x 3 x 4 x ... x 99) / (2 x 4 x 6 x 8 x ... x 98)
= 99! / [2 x (1 x 2 x 3 x 4 x ... x 49)]
= 99! / (2 x 49!)
= 7.67129689 x 10^92

2008-06-21 11:56:16 補充：
對不起，應該是除2的49次方才對！
1x3x5x7x9x...x97x99

= (1 x 2 x 3 x 4 x ... x 99) / (2 x 4 x 6 x 8 x ... x 98)

= 99! / [2^49 x (1 x 2 x 3 x 4 x ... x 49)]

= 99! / (2^49 x 49!)

= 2.72539213975 x 10^78

2008-06-21 20:01:39 補充：
再準確些的答案是
2.7253921397507295029807132454009 x 10^78

2008-06-26 23:22:18 補充：
嚴重抗議jack818925用卑鄙地用不同戶口做票...
兼且那個答案是錯的！

我冇用不同戶口做票,而答案是錯的話,我可以話你知我用計算機一個一個禁計

2008-06-28 21:14:01 補充：
重有一樣,你覺得邊一個戶口係我做票的不同戶口,冇憑冇據5好屈我

1＝1
1×3＝3
1×3×5＝15
1×3×5×7＝105
1×3×5×7×9＝945
1×3×5×7×9×11＝10395
1×3×5×7×9×11×13＝135135
1×3×5×7×9×11×13×15＝2027025
1×3×5×7×9×11×13×15×17＝34459425
．．．
．．．
．．．
1×3×5×7×9×….×89×91＝32122956998390482494366629620388019345854961856039062186274778466796875
1×3×5×7×9×….×91×93＝2987435000850314871976096554696085799164511452611632783323554397412109375
1×3×5×7×9×….×93×95＝283806325080779912837729172696128150920628587998105114415737667754150390625
1×3×5×7×9×….×95×97＝27529213532835651545259729751524430639300973035816196098326553772152587890625
1×3×5×7×9×….×97×99＝2725392139750729502980713245400918633290796330545803413734328823443106201171875