Question

英语跟数学好的请进！

1. Which of the following alternatives shows two logically equivalent symbolic for the negation of, "Sandi has grown or Mike has shrunk" ?
a) "It is not the case that Sandi has grown or Mike has shrunk";
"Sandi has not grown or Mike has not shrunk"
B \Sandi has not grown but Mike has shrunk";
\It is not the case that Sandi has grown and Mike has not shrunk"
C. \Neither Sandi has grown nor Mike has not shrunk";
\It is not the case that Sandi has grown and Mike has shrunk"
D. \Neither Sandi has grown nor Mike has shrunk";
\It is not the case that Sandi has grown or Mike has shrunk"

2.true or false
a.The statement,\John is eligible to vote if and only if John is 18 years old." is
logically equivalent to saying \If John is eligible to vote then John is 18 years old."

b.

Answer 1

1.下列哪一种选择显示出两个逻辑等价象征性的反面,”为Sandi成长或迈克已经缩水”吗?
A.“这不是已经成长的情况下,Sandi或迈克缩水了”;
“Sandi没有长大或迈克没有缩水了”
B.Sandi没有长大,但是麦克缩水了”;
情况并非如此,Sandi成长和迈克没有缩水了”
C.Sandi c \也已经成长也没有缩水了”,麦克。
情况并非如此,Sandi成长和迈克缩水了”
D . 既不Sandi成长也迈克已缩小”;
情况并非如此,Sandi成长或迈克缩水了”
2.真或假 或者对错
a. 该声明,\约翰有资格投票选举中,当且仅当约翰已经18岁了。”
逻辑上相当于说\如果约翰有资格投票选举随后约翰已经18岁了。”

（1）A；（2）A:TURE；B:TURE

Answer 2

Which of the following alternatives shows two logically equivalent symbolic for the negation of, "Sandi has grown or Mike has shrunk" ?
下列哪一种选择显示出两个逻辑等价象征性的反面,”为Sandi成长或迈克已经缩水”吗?

a)
一)

"It is not the case that Sandi has grown or Mike has shrunk";
“这不是已经成长的情况下,Sandi或迈克缩水了”;

"Sandi has not grown or Mike has not shrunk"
“Sandi没有长大或迈克没有缩水了”

B \Sandi has not grown but Mike has shrunk";
B \ Sandi没有长大,但是麦克缩水了”;

\It is not the case that Sandi has grown and Mike has not shrunk"
\情况并非如此,Sandi成长和迈克没有缩水了”

C. \Neither Sandi has grown nor Mike has not shrunk";
Sandi c \也已经成长也没有缩水了”,麦克。

\It is not the case that Sandi has grown and Mike has shrunk"
\情况并非如此,Sandi成长和迈克缩水了”

D. \Neither Sandi has grown nor Mike has shrunk";
d . \既不Sandi成长也迈克已缩小”;

\It is not the case that Sandi has grown or Mike has shrunk"
\情况并非如此,Sandi成长或迈克缩水了”

2.true or false
2.true或假

a.
一。

The statement,\John is eligible to vote if and only if John is 18 years old." is
该声明,\约翰有资格投票选举中,当且仅当约翰已经18岁了。”

logically equivalent to saying \If John is eligible to vote then John is 18 years old."
逻辑上相当于说\如果约翰有资格投票选举随后约翰已经18岁了。”

Answer 3

第一题选a
第二题a是对的 b看不清楚