§74 Closures of Relations (关系的闭包)Introduction(1) Example 0 (page 544)Aputer network has data centers in Boston, Chicago, Denver, Detroit, New York and San Diego There are direct, one-way telephone
abcd 1. 写出下列各逻辑方程式:注意:CP1=Q0???0001101(4) 逻辑功能分析
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24放大电路的频率响应241频率响应的概念 242共发射极放大电路的频率响应241频率响应的概念在实际应用中,电子电路所处理的信号都不是单一频率的信号,而具有一定的频谱。例如音频信号的频率范围从20Hz到20kHz。由于放大电路中存在电抗元件(如管子的极间电容,电路的负载电容、分布电容、耦合电容、射极旁路电容等),使得放大器可能对不同频率信号分量的放大倍数和相移不同,输出信号的幅度和相位,会随
§44 Binomial Coefficients (二项式系数)The Binomial Theorem (1) Example 1 (page 227) (x+y)3=x3+3x2y+3xy2+y3 (2) Theorem 1The Binomial Theorem (page 327)(x+y)n = ∑j=0 n C(n,j) xn-j yj=C(n,0)xn + C(n,1)xn-1y
§15 Rules of InferenceIntroductionExample:Read it by yourself(Page 63)Modus Ponens (假言推理)Hypotheses------ p,p→qConclusion-------q also written as:p p→q ----------- q(2) The Correctness of Modus Ponens
§24 Cardinality(基数)(1) Definition 1 (page 158)The sets A and B have the same cardinality if and only if there isa one-to-one correspondence from Ato B(2) A set that is either finite or has the same ca
§74 Generating Functions (生成函数)Introduction (1) Motivations (a) can be used to solve many types of counting problems; (b) can also be used to solve recurrence relations; (c) can also be used to prove
§94 Connectivity (连通性)IntroductionPlease see book (page 621)2 Paths(1) Definition 1 (page 622) Let n be a nonnegative integer and G an undirected graph A path of length n from u to v in G is a sequenc
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