５０元一題(聽朝三點前前)

A man is 14 years older than his son.Two years later,his age will be twice that of his son.Find the age of his son now.


2(x-4)
----------- = -3
-3(x+3)



                                  1     2     3    4
Consider the sequence  ---  ; --- ; --- ; ---  ......
                                  2     3     4    5

(a) Write down the 5th , 6th , 7th and 8th terms of the sequence
(b) Express the Nth term of the sequence in terms of N
(c) What is the 100th term?

1         x          x        1
----   -  ----   =   ----  -  ----
4        2           4       8



3            5           1  
---(x+1) - ----  =  - ---- (x-2)
2            6           3

5 times a number is greater than 3 times the number by 4. Find the number.
Solution: Let x be the number

The length of a rectangle is 3 cm longer than its width.The perimeter of the rectangle is 30 cm.Find the length of the rectangle.


For a product, its marked price=$50, cost price=$40 and selling price=$36.
What percentage is the price marked up?

[ 本帖最後由 彤兒` 於 2008-8-20 09:22 PM 編輯 ]

thz
請開sell po:)
歡迎再help xd

1     2     3    4
Consider the sequence  ---  ; --- ; --- ; ---  ......
                                  2     3     4    5

(a) Write down the 5th , 6th , 7th and 8th terms of the sequence
(b) Express the Nth term of the sequence in terms of N
(c) What is the 100th term?
(a)5/6, 6/7, 7/8, 8/9
(b)N/(N+1)
(c)100/101




↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑
我想問呢題果d 5/6, 6/7, 7/8, 8/9
係唔係姐係 六分之五,七分之六,八分之七同9分之八?

可吾可以詳細D講呢一題?
因為三個答案都唔係好明點求出尼..
THZ!

多謝哂呀.
錢sd緊比你:)
不過請唔好del答案住...]]