所屬科目： 中山◆資工◆離散數學
2. [10%] If and n is composite, then there is a prime p such that p|n.
(a) [10%] Prove that if 169 integers are selected from {1, 2, 3, ., 336}, then the selection must include two integers x,y, where x|y or y|x.
4.[10%] Let How many strings in A have xy as a proper prefix?
7. [10%] Find by Euclidean algorithm.
8. [10%] How many integer solutions are there of the equation c1+c2 +c3+c4+c5 = 37 if 0≤ci for all 1 ≤ci≤5?
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and n is composite, then there is a prime p such that p|n.
How many strings in A have xy as a proper prefix?
by Euclidean algorithm.