2011届高考数学单元练习及解析简单的逻辑联结词、全称量词与存在量词（Exercises and analysis of the 2011 college entrance examination mathematics unit simple logical connectives, full name quantifiers and existential quantifiers）.docVIP

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2011届高考数学单元练习及解析简单的逻辑联结词、全称量词与存在量词（Exercises and analysis of the 2011 college entrance examination mathematics unit simple logical connectives, full name quantifiers and existential quantifiers）.doc

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2011届高考数学单元练习及解析简单的逻辑联结词、全称量词与存在量词（Exercises and analysis of the 2011 college entrance examination mathematics unit simple logical connectives, full name quantifiers and existential quantifiers） Simple logical connectives, quantifier and existential quantifier A group of questions With logical connectives proposition judgment 1. P, q is a simple proposition, P and Q P or q is false false () A. is necessary but not sufficient condition B. necessary sufficient condition C. necessary and sufficient condition of D. is neither sufficient nor necessary conditions Analysis: P and Q is false, namely P and Q in at least one false; P or q is false, namely P and Q are false. Answer: A The following proposition in 2. groups, to meet the p or qis true,p and q is false, p is true (is) A.p:0; q:0 =?? B.p: in ABC, if cos2A = cos2B, A = B; q:y = SiNx in the first quadrant is increasing function C.p:a + B = 2 (a, B, R); Q: |x| x inequalities and the solution set is (- -, 0) D.p: round (X1) 2 (Y2) 2 = 1 x = 1 straight line area is divided; q:? X in {1, 1,0}, 2x1 0 Analysis: to meet thep or qis true,p and q is false, p is true, then p is a false proposition, proposition q is true.A P is a false proposition, proposition q is false; B P is true, q is a false proposition; C P is false proposition q is true proposition; D P is true, q is a false proposition. Answer: C Proposition 3. p:{2} in {1,2,3}, q:{2}? {1,2,3}, the following proposition: judge P or q is true or false; the p q; the P and Q is true; the P and Q is false; the non P is true; the non Q is false. The judgment of the correct number is (fill. Do you think all the correct number) Analysis: p:{2} in {1,2,3}, q:{2} {1,2,3}, p q is really false? 1 4 5 6, so right. Answer: 1. 4 5 6 The group of two Full (special) proposition and judgment 4. (2009 Zhejiang college entrance examination) if the function f (x) = X2 (a, R), then the following conclusion is true () A.? A, R, f (x) in (0, + infinity) is increasing function B.? A, R, f