致用高中料二乙練習卷_111_1_1
Authored by 賴珍寧 賴珍寧
Mathematics
11th Grade
Used 5+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 2 pts
若數列 ，則第5項 =
2.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
若數列 之遞迴關係如左 ，則此數列的第8項 為
23
28
33
38
3.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
若 x 為 和243的等比中項，y為31 和57的等差中項，則(x,y)=
(9,44)
(-9,44)
Answer explanation
若a，b，c三數為等比數列，則稱b為a與c的等比中項(幾何平均數)。
若 a 、 b、 c 三數成等差數列，則中間項 b 稱為 a和 c 的等差中項。
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
等比級數 到第8項的和為? （已知 ）
1093
1094
3280
3281
5.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
若等差數列的第10項為57，第25項為-3，則公差為
-2
-4
-6
-8
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
有一份數學試卷，共23題，總分100分。其中單選題每題5分有8題，填充題每題4分有15題。若小騰單選題答對x題，填充題答對y題，共答對15題，得到65分，請問他單選題答對幾題？23
4
5
6
8
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
下列方程組中，何者的幾何意義是兩直線平行？
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