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幻藍

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~~

抹茶可樂

咩來的

ben

順其自然啦～
咪當同個老師玩野囉～
[E-TeH]

幻藍

Originally posted by 落雷 at 2005-1-21 10:47 PM:
咩來的

1) if 1³+2³+3³+...15³=14400 , find 2³+4³+6³+...30³

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

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?

抹茶可樂

1.抽個2^3(即係8)出來

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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

oscar

比奧數廢啲...

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救我

pokevect

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 ]

pokevect

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??