
49期放課後学習数学第1回
Authored by 櫻田稔 櫻田稔
Mathematics
10th Grade
Used 27+ times

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6 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
真
偽
命題でない
Answer explanation
不等式 x-3>-4 を解くと x>−1 となります。したがって x=-2 はこの不等式を満たさないため、命題は偽です。
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
次の文は命題であるか。命題であるものは,その真偽を述べよ。
「長方形は平行四辺形である」
真
偽
命題でない
Answer explanation
「長方形は平行四辺形である」という文は命題であり、真です。長方形は特定の条件を満たす平行四辺形の一種であるため、この文の真偽は真となります。
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
次の文は命題であるか。命題であるものは,その真偽を述べよ。
「168は大きい数である」
真
偽
命題でない
Answer explanation
「168は大きい数である」という文は主観的な表現であり、真偽を明確に判断できないため、命題ではありません。したがって、正しい選択肢は「命題でない」です。
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
必要
十分
必要十分
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
必要
十分
必要十分
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