
變分I_DSE Paper(II)
Authored by CHAN FONG
Mathematics
11th Grade
Used 20+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
設 y 部分隨 正變,部分則隨 x 正變。當 x=1時,y=5 ;當 x=4 時, 。當 時x=2,求y 。
5
7
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
設 x 隨 反變,若 y 增加 69%,則 x
減少 76.9% (3 位有效數字)
增加 30%
減少 23.1% (3 位有效數字)
減少 30%
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
若 x 與 y 反變,且與 正變,則
為一常數
為一常數
為一常數
為一常數
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
已知 x 隨 y 正變且隨 反變。若 y 減少 10% 而 z 增加 20%,則 x 減少
37.5%
25%
23.6%
10%
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
設 y 一部分為常數,另一部分隨 x 反變。當 x=1 時,y=7 ;又當 x=3 時,y=3。求當 x=2 時的 y。
2.5
3.5
4
5.5
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
若 z 隨 正變且隨 x 反變,下列何者必為常數?
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
假定 y 隨 x 正變且隨 反變。若 x 及 z 均減少 20%,則 y
減少 20%
增加 25%
減少 17%
增加 20%
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