Variations問題…求救-_-"
本帖最後由 Rebellion.KLC 於 7-4-2010 11:13 編輯學院的功課，有關Variations的-_-
做完左頭五頁工作紙，點知Part C堆問題睇得明唔識點做= ="
重有兩題MC就資料好少，唔多明點拆-_-"
（我會考係呢一部份理解都比較弱，請見諒…而且我之前用中文讀，轉左英文都比較吃力= =）
希望有人可以解答我呢幾條LQ= = 本帖最後由 nomygf 於 7-4-2010 15:09 編輯
1. S=K1(t)+K2/(t) (where k1&k2 is non-zero constant)
When T=1, S=8, we have,
8=K1+K2_____(1)
When T=6, S=13, we have,
13=6K1+K2/6______(2)
(2)->(1)
K1=2
K2=6
Put K1 and K2 into eqt.
S=2t+6/t
2. Z=kxy (where k is non-zero constant)
when x become 0.9x, y become 1.1y, we have
Z=(0.9)(1.1)xy
Z=0.99xy
Pencetage change = (0.99xy-xy)x100%/xy
=-1%
Which mean decrease by 1%
Other questions are using similar method to solve,
try it again !
1. S=K1(t)+K2/(t) (where k1&k2 is non-zero constant)
When T=1, S=8, we have,
8=K1+K2_____(1)
When T ...
nomygf 發表於 7-4-2010 13:35 http://www1.nakuz.com/bbs/images/common/back.gif
錯誤:13=6K1+K2/13______(2) -.- sub 錯數 -.- sub 錯數
nomygf 發表於 7-4-2010 15:08 http://www1.nakuz.com/bbs/images/common/back.gif
呢d數通常唔係分數做k1同k2
9成都係整數。 咁S咪就係
S=7+t =.=做咩諗得咁辛苦
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