作者christensen ()
看板Grad-ProbAsk
标题[问题] 离散求助
时间Thu Mar 19 01:32:33 2009
1. which integers leave a remainder of 1 when divided by 3, a remainder of 3
when divided by 4, and a remainder of 4 when divided by 7 ?
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2. suppose that f:Z -> R with f(1) = 7, and f(n)=4f(n/3)+7, for n=3^k,
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k属於 Z . Solve for f(n) relative to the set S = { 3^k l k属於N }.
3. Let F(x), P(x), and M(x,y) be the statement "x is female,""x is a parent,"
"x is the mother of y," respectively. The statement "if a person is female
and is a parent, then this person is someone's mother" can be expressed as
a logical expression involving predicates, quantifiers with a universe of
discourse consisting of all people, and logical connectives as __________.
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