[이산수학1-2]Propositions(명제)

명제(Proposition) - 참, 거짓을 판별할 수 있는 문장. - 참, 거짓 중 하나만 가져야만 한다. (Example) Which of sentences are either true of false?

and Choose the propositions. (a) The only positive integers that divide 7 are 1 and 7 itself (b) For every positive integer n, there is a prime number larger than n.

(c) x + 4 = 6. (Sol) (a) is true, therefore (a) is proposition.

(b) is true, therefore (b) is also true. (c) is depends on the value of the variable.

So, it cannot be determined. Therefore, (c) is not proposition.

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