1+2+3+.......9999

👨🏻‍🏫 學術台數學

tommy_

2006-10-30 2:21 am

1+2+3+.......9999

回答 (18)

[匿名]

2006-10-30 3:02 am

✔ 最佳答案

49995000

2006-10-29 19:04:13 補充：
怎麼會想問這種問題呢?我算了許久答案不知有錯嗎?

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[匿名]

2006-10-30 11:32 am

1+2+3+...+9999
=(1+9999)x9999/2
=10000x9999/2
=99990000/2
=49995000

參考: 自己

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wai ho

2006-10-30 7:10 am

1+2+3+.......9999=49995000

參考: me

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Ping Wah

2006-10-30 6:55 am

(1+n)n/2
=(1 + 9999)9999/2
= 49995000

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Doggie

2006-10-30 2:29 am

(1+9999)*9999/2
=10000*9999/2
=5000*9999
=49995000

參考: me

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用戶170633

2006-10-30 2:28 am

there is a equation for this
n x (n+1)/2

9999 x (10000)/2

= 49995000

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Johnson

2006-10-30 2:27 am

(1+9999)x9999÷2=49995000

參考: my own knowledge

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安居樂業

2006-10-30 2:26 am

9999/2 再X(1+9999)=49995000

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terry_freedom

2006-10-30 2:24 am

(1+9999)x9999
----------------------
2

=49995000

參考: me

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PINKY

2006-10-30 2:24 am

(1+9999)9999/2
=49995000

參考: 自己

👍 0 👎 0

收錄日期: 2021-04-12 22:40:32
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