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# 【推荐】2019高中数学第一章常用逻辑用语简单的逻辑联结词学案含解析选修5

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[ 2] "pq""pq"" p"
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[ 3] p x2mx10 q 4x2 4(m2)x10 "p q" m
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m2 q 16(m2)2160 3m1. m (1) [] pq pq p p q q p q [] p1 {x|x2a}q2 {x|x2a} a "p q"a "p q" p 1{x|x2a} 12a a1 q 2{x|x2a} a4. "p q" a1 a4 a1 "p q" a1 a4 a4.

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1p P y2x3 q P yx2 "pq" P(xy)( )

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2 p xR|x|x x>0 q xR x23 x 3

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x 3 q p ( p)q 3 p2{1,3}q2{x|x240} pq2{1,3} 2{x|x240}

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p2{1,3} {x|x240}{2,2} q2{x|x240} 2{1,3} 2{x|x240} 4 p axb0 xxbaq x (xa)(xb)0

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