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1、点击集合中的数学思想,?????????e???????L??????,?????Q?????????????????{?????Z?????Q???e???????????????L,?????Z?P?[?????c???????R?????????x?????L???????????Q??,?????????B,???????M??R,???????x?Q?????????x???Q??,???Z?}?e?=???????????????B???????????x????,?<?????B???????
2、:?????B???<,???R?+?????y,?+??????????????1??MR,P?e?5?[???????x,????M?BP????????M-P={x
3、xM,xP},?0M-(M-P)????()(A)P(B)MP(C)MP(D)M????:????1?L???i?????=????M-P??2?L???i?????=????M-(M-P),???
4、(B)??2???????xM={(x,y)
5、y=9-x2},N={(x,y)
6、y=x+b},?9MN,?0b?????????????e(
7、)(A)
8、b
9、32(B)0<b<2(C)-3b32(D)>3?+<3?????????C??,???=y=x?B????y=x+b?
10、??????,?????????y??-3b32,?????
11、(C)??3??U?e????,???????xPR,Q??PQU,???]PR,Q?????[???x?????????C,????????????????,?0???[?????????C?????e(???????????[?????C)????:?????e??????????????3,
12、???y???R?<??????:(1)P!UQ;(2)P(Q!UP);(3)(PQ)!UQ??????R,???(?Q?????(?Q???8?e???=????????????????????,?????????????????Z???(?????C?????4,?o?B?<???????(?+?????(????????,?????????R??????4?????xQ={(x,y)
13、y=x2+2},B={(x,y)
14、y=14x+m},??AB=,????????m???????M??????:
15、?8?5????????????????,?????(??y=x2+2,y=14x+m????????,?????(x2-14x-(m-2)=0????????,????=16+4(m-2)<0,????<6???=?+????(???L??)b2b-:9-21m127425?????xA={(x,y)
16、x=m,y=3m+1,mN},B={(x,y)
17、x=n,y=a(n2-n+1),nN},???e?a???Z????????a????AB????B????????????:A={(x,y)
18、y=3x
19、+1,xN},B={(x,y)
20、y=a(x2-x+1),xN}????AB,???????(??y=3x+1,y=a(x2-x+1)???:?
21、????????????,???????????e???(ax2-(a+3)x+a-1=0???:?
22、???[????????????a0?9aZ,?80,??3a2-10a-90????13(5-213)a13(5+213)????a=1R,2R,3R,4??????a=1R,4?a?x???C,a=2R,3?A?a?x???C?????Za=1?+4,????AB?
23、
24、R,???+?B?+???Q?????y?+??,?8?e???+?????????c???e?=???????+?[??????????,?<?????+,?????????[????????,?+?-???[???????y??????????,?+?-?????????[???????????
25、???????????????(????????,??????????????????????6???xA={(x,y)
26、y=x2+mx+2},B={(x,y)
27、y=x+1,0x2}??AB,????????m
28、???????M??????:???5???x????????????,?c???????+???B????????????:??????y=x2+mx+2?B????y=x+1(0x2)?
29、??????,??????m???????M????f(x)=x2+(m-1)x+1,?0?
30、f(0)=1>0??f(x)=0?Z[0,2]?}?
31、?9???
32、???[??,?
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