各位知識朋友 , 入黎幫我手 ar !!!
我有幾條數學問題唔識 , 幫手解答 ar( 數學F.1 )!!!!!!!!!!!!!!! (要步驟)
1. 題目網址 : http://i34.tinypic.com/fnh3tk.png
2. Simpify:
(a) x + xy - 2xy
(b) ( 3x - 6 ) + 8x
3. Find the value of the following
(2^6)^5 / (2^7)^4
<40 marks> 各位知識朋友 , 入黎幫我手 ar !!! ( 數學F.1 ) (86)
2008-08-10 5:39 am
回答 (3)
2008-08-10 6:06 am
✔ 最佳答案
1. since AB is a vertical line, so x1=x2 and AB=y2-y1 (x2>x1) or AB=y1-y2 (x1>x2)
Therefore, ans. is A
2.(a) x + xy - 2xy = x+(1-2)xy= x-xy
(b) ( 3x - 6 ) + 8x= 3x-6+8x = (3+8)x-6= 11x-6
3. (2^6)^5 / (2^7)^4
=2^(6*5)/2^(7*4)
=2^30/2^28
=2^(30-28)
=4
2008-08-10 5:59 am
1. D
2. Simpify:
(a) x + xy - 2xy
= x + ( -xy)
= x - xy
(b) ( 3x - 6 ) + 8x
= 11x - 6
3. Find the value of the following
(2^6)^5 / (2^7)^4
= 1073741824 / 268435456
= 4
2. Simpify:
(a) x + xy - 2xy
= x + ( -xy)
= x - xy
(b) ( 3x - 6 ) + 8x
= 11x - 6
3. Find the value of the following
(2^6)^5 / (2^7)^4
= 1073741824 / 268435456
= 4
參考: myself
2008-08-10 5:51 am
1. I dont know 2(a).x+-xy 2(b)11x-48x=-37x
3. 1073741824/268435456
3. 1073741824/268435456
收錄日期: 2021-04-15 16:58:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080809000051KK02602