
翰林國中數學2下CH1-2-等差級數

Quiz
•
Mathematics
•
8th Grade
•
Medium
翰林數學 翰林數學
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列何者不是等差級數?
1+1+1+1+1
1+0+0+1+0+0
1+3+5+7+9
(-1)+1+3+5
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
有一等差數列共有五項,其首、末兩項的和為60,則中間三項的和為多少?
180
120
90
60
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
有一個等差級數a1+a2+……+an,其和為Sn,則各項皆加上5後所成的新等差級數,其和為Tn,則下列何者正確?
Sn=Tn
Tn=5Sn
Tn=Sn+5
Tn=Sn+5n
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若87+91+95+99+103+107+111+115=(87+115)×m,則m=?
8
6
5
4
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
若一個等差級數前n項和Sn=n(2n-1),則下列敘述何者錯誤?
首項為1
公差為4
前10項的和為190
第10項為36
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
觀察下列運算的規律:1=12,4=1+3=22,9=1+3+5=32,16=1+3+5+7=42,……,則1+3+5+……+39=?
361
400
441
484
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列何者不是等差級數?
1-1+1-1+1
5+5+5+5+5
1+2+3+4+5
10+8+6+4+2
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