
南一國中數學2下ch1-2
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
數學 南一
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一個等差級數共有八項,其和為208,且末項比首項大28,則此級數之公差d為多少?
3
4
5
6
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一等差級數的首項是4,前10項的和是355,則第幾項是67?
7
8
9
10
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知一等差級數共20項。若其首項為7,公差為-3,則此級數總和為多少?
-400
-410
-420
-430
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知一等差數列的首項a1=15,公差d=-3,則S20為多少?
-240
-250
-260
-270
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
求 (-45)+(-41)+(-37)+……+347+351=?
15300
15600
15900
16200
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
求等差級數3.5+3.1+2.7+…… 到第二十項的和=?
-6
-16
-26
-36
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
阿明背英文單字,第一天背10個,之後的每一天都比前一天多背2個單字,則一個星期後,阿明一共背了多少個英文單字?
22
70
102
112
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