南一國中數學2下ch1-2

南一國中數學2下ch1-2

8th Grade

10 Qs

quiz-placeholder

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南一國中數學2下ch1-2

南一國中數學2下ch1-2

Assessment

Quiz

Mathematics

8th Grade

Practice Problem

Hard

Created by

數學 南一

Used 9+ times

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10 questions

Show all answers

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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