香港寵物小精靈村落 論壇

標題: 大家救救我~~ [打印本頁]
作者: 幻藍    時間: 21/1/2005 10:31 PM
標題: 大家救救我~~
我老師今日無端端捉左我聽日去參加第七屆香港青少年精英選拔賽
睇完上屆份題目之後發覺有70%未學過
大家救救我~~
作者: 抹茶可樂    時間: 21/1/2005 10:47 PM
咩來的
作者: ben    時間: 21/1/2005 11:17 PM
順其自然啦～
咪當同個老師玩野囉～
[E-TeH]
作者: 幻藍    時間: 21/1/2005 11:23 PM
Originally posted by 落雷 at 2005-1-21 10:47 PM:
咩來的

1) if 1<sup>3</sup>+2<sup>3</sup>+3<sup>3</sup>+...15<sup>3</sup>=14400 , find 2<sup>3</sup>+4<sup>3</sup>+6<sup>3</sup>+...30<sup>3</sup>

2) Let a<sub>1</sub> , a<sub>2</sub> , a<sub>3</sub>... be a sequence of positive integers , a<sub>1</sub><a<sub>2</sub><a<sub>3</sub><...and a<sub>n+2</sub>=a<sub>n</sub>+a<sub>n+1</sub> for all n>1. if a<sub>7</sub>=200 , finda<sub>8</sub>

3) ABCDEF is a convex hexagon. Each of three diagonals AD , BE , CF bisects the area of the hex (see figure) .  Show that three diagonaks intersects at a common point .
[hint: the area of a triangle of side of of length a , b and included angle "theta" is equal to 1/2ab sin "theta"

4) find three consecutive even integers with there product equal to 37*****2.

5) what is sin , cos and tan?

6)in question 4 , what does 37*****2 mean?
作者: 抹茶可樂    時間: 21/1/2005 11:32 PM
1.抽個2^3(即係8)出來
作者: 幻藍    時間: 21/1/2005 11:48 PM
Originally posted by 落雷 at 2005-1-21 11:32 PM:
1.抽個2^3(即係8)出來
之後呢
作者: oscar    時間: 21/1/2005 11:48 PM
比奧數廢啲...
作者: 幻藍    時間: 22/1/2005 12:01 AM
救我
作者: pokevect    時間: 22/1/2005 11:16 AM
Originally posted by 可愛的兔兒 at 2005-1-21 11:48 PM:
之後呢


將2^3 乘入去條式度
答案咪115200

[ Last edited by pokevect on 2005-1-22 at 11:18 AM ]
作者: pokevect    時間: 22/1/2005 11:22 AM
Originally posted by 可愛的兔兒 at 2005-1-21 11:23 PM:

2) Let a1 , a2 , a3... be a sequence of positive integers , a123<...and an+2=an+an+1 for all n>1. if a7=200 , finda8


a123<... 點解??
作者: pokevect    時間: 22/1/2005 11:56 AM
第4題: 154, 156, 158



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