
3上 3-1 證明與推理
Authored by 康軒數位 康軒數位
Mathematics
9th Grade
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2
3
4
5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列關於奇數與偶數的敘述何者錯誤?
奇數的平方被4除後餘數必為1
偶數的平方必為4的倍數
偶數的正平方根必為偶數
四個連續整數的和必為偶數
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
150
120
90
60
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知: a3為一個偶數,3b為一個奇數。
求證:a2+b2為奇數。
證明:(1)∵a3為一個偶數,∴a為偶數
(2)∵3b為一個奇數,∴b為奇數
(3)設a=2m(m是整數),b=2n+1(n是整數)則a2+b2= (甲)
(4)其中(甲)不為2的倍數,∴a2+b2為奇數。
請問(甲)應填入下列何者,可得完整證明?
2a+2b
4m+4n+1
4m2+4n2+1
4m2+4n2+4n+1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
欲使用SAS全等,應加條件∠C=∠F,方能使兩個三角形全等
欲使用RHS全等,應加條件∠C=∠F=90°,方能使兩個三角形全等
欲使用RHS全等,應加條件∠A=∠D=90°,方能使兩個三角形全等
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