
命題と条件
Authored by Mori undefined
Mathematics
10th Grade
Used 10+ times

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9 questions
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1.
MULTIPLE CHOICE QUESTION
5 sec • 1 pt
命題「円周率πは有理数である」の真偽を述べよ。
真
偽
2.
MULTIPLE CHOICE QUESTION
5 sec • 1 pt
命題「自然数4は有理数である」の真偽を述べよ。
真
偽
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
xを実数とする。命題「x>3 ならば x>1」の真偽を、集合を用いて調べよ。
真
偽
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
nを自然数とする。命題「nが素数ならば、nは奇数である」の反例になっているものは、次のうちどれか。
n=0
n=1
n=2
n=3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
xは実数とする。x2=9はx=3であるための
必要条件
十分条件
必要十分条件
必要条件でも十分条件でもない
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
xは実数とする。x=3はx2=9であるための
必要条件
十分条件
必要十分条件
必要条件でも十分条件でもない
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
aは実数とする。a2=0はa=0であるための
必要条件
十分条件
必要十分条件
必要条件でも十分条件でもない
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