找回密码
 立即注册
查看: 123|回复: 0

1.2.4?????

[复制链接]

0

主题

0

回帖

56

积分

管理员

积分
56
发表于 2019-9-13 23:46:11 | 显示全部楼层 |阅读模式
???1.2.4?????

???

????

1 ??????????????????

2 ?????????????????????????????

?????

???????????????????

???????????

????

? ?????????

1 ???????????????? 2 ???????????????????A?B?C???????1????????????????????

-5-4-3-2-124

? ?????????

1??????

??????A?B?C????????????????????????

????????????????????????????__________.[??:? ? ?Z X X K]

??2??????2????2=2?-2??????___,???____________________ ????

??????????????????????

-4?3.5?-2

2 ??????? ?????????????????

??????????______,??????????____________,???????____ ?????????

______

?????????????

1?0?-3.5?5 2-5-4-3-2-124

1. ?a?0???a?=

2. ?a?0???a?=

3. ?a?0???a?=

????

?1????????????????????????????

?2??????2??????2?-2??????2???a??????a,-a??????a?????????????

? ?????????

1 ????????

?1 ?????????

12?- 4.5 3?-7.5?0 ?1000 5

?2 ?????7????????

1????(1)|+2|= ?5= ?|+8.2|= ? (2)|0|= ? (3)|-3|= ?|-0.2|= ?|-8.2|= .

2 ????????????

?3 ????????

? ?-4?=? 4? ? ?

? ?-7??0 ? ?

? ????????????? ? ?

? ?????????????????????? ?

? ?????1?????? ??

4??-5?=________?7.5?=_______ -?-3?=_________ 3

-?+3?=_______?0?=________

3 ??????

1.?????1 0 0 -1 ? 1 -1?-1

2.???????5???8?

?-0.05? 0?

?-3? 1

???

?3 .???????????

?1?-?-1??-?+2??2?-

???????13???

?4 ??????????????????,???6?????????????????????????????????????????????-20?+10?+12?-8?-11 ?????????????,????????????? 571? - ?3?-?-0.3?? |-| 343

? ?????????

1 ???????

2?????????????????

3???????????????

? ?? P 14

?????

1??5?______??21?______??2.?______????______? 3

2??322?????______??????3???______?????________? 55

3??????????4????????????????________?

4???a??3???a?______?a?______?

5??????????? ?

A??a????? B??????????????????

C??a?b?a?b????? D????????????????????

6????????????????????????????????????????????????????????????????????

??????? ?

A?0? B?1? C?2? D?3?

7????2a??2a??a?????? ? ?

A?a?O B?a?O

8????????????(1)?2 C?a?O D?a?O 1? (2)0? 2(3)????2.5???? (4)????3????

9? ???????????????????????(????)???0.002L??????6??

??????????

(1)?????????(????????)?

(2)????????????????

???1.2.4 ??? ????

????????????1????

?2.4????????

????

????:?????????????????????????????????????????????????????????????????????????????????????????????????????????

????:????????????????????????????????????????????

????:?????????????????????????????????????????????????????????????????????????

????:?????????????????????????????????????????

????:??????????????????????????????

????:??????????????????????????

????:???11?14?.

??????

???.????,????.

1.??????????,????????????.

2.??????????:

???????????????????????????????????????????.

3.????????:??????????a???????????a???????|a| .?????????|20|=20?|?10|=10,???|0|=0.???????????????????????????????????????????????????????????????????????????????????????????????????????????????

?????????????????????????????????????????????????????????

???.????,????.

1.????:?????????????????a?????????

?3?5?0??58?0.6

????????????

?????????????????????????????????????????????????????????????????????,???????

????????????????????????????????????????????????????????????????????12????:

2.??:????????????????????????????0?????0.

(1)?a?0?,?a?=a

????

?a?0?,?a?=-a .

(3)?a=0?, ?a?=0

???.????,????.

????12?????

???1???????????????????????2?????????????????????????????????????????????????????????????

???.????,?????

1.????????12?????????:

(1)?14??????????

(2)??14????????????.

2.?????:?????????????????????????????????????????????????????????????

3.????????????:

(1)14????????????????????.

(2)?????????????????????????????????????????

4.???14?????????????????????????????????????.?:

(1)????0,0????,???????

(2)????,????????.

5.????:????????????????????????100??90?????????????????????????????????????

?????????????????????????????????????????????,?????????2????????????????????????????????????????????? ?????????. ???.????,????.

?2??????????????13????.

?????????????????????????.

???.????,????.

???14????.

???.????,????.

(1)??????????.(2)???????????

???.????,????.

???14?15??4?5?6?10?.

???1.2.4?????

1.2.4?????

????????11???12?

?????

1??????????????????????????

2???????????????????

3???????????????

4????????????????

????????????????????????

???????????????????????

?????

?? ??

1? ?????????

2? ?????????????????????????

??????

1? ???????

?????11??1.2-5????????:

???,??????a??????????a????,

??|a|

2? ?????????

???:?1?|+6|? ?|0.2|? ? |+8.2|? ?

?2?|0|??

?3?|-3|? ?|-0.2|? ? |-8.2|? . ?????????????????????????

?1??????????

?2?????????

?3????????????????

?????????:

(1) ?a????, |a|=____

(2) ?a=0?, |a|=____

(3) ?a????, |a|=____

?1 ??????????

?7

12,?110,?4.75,10.5?

?2 ???

?1????

??1?1?; ?2???1? 2?3

???

1??12???1

2????

?1???????????_______,?????????

????__________

?2? ??|a|=a,?a?__________?, ??|a|=-a,?a

?__________?

3? ?????????????

???

?1??????????????????????????

?2?????????????-2????????????? ?????

?3??????2????????????

???

?1? ?????????a??????????????0?? ???????????????a???

a?0?

?2????????????????????|a|=|-a|

???

?????

???????????????

1?????????a????????????a?????????

2?????????????????????????????? ????????

3. ?????????????

?????

1.???

(1) -3????______, ????____;

(2) ???+??????7???_____;

(3) 10.5????_____, ????______;

(4) ????5.1????-????_____?

(5)_________?????????, ________?????????

(6)a________?, |a|=a, a________?, |a|=-a

(7) |-35.6|=________, |a|=_____(a<0)

(8) |x|=5,?x=______

?9??????4????________

(10) ?????2??5????________

2.???????

?1?????12??????????

?2?????0??????????

?3????????-3???????

3??????????????

?1? ?????????????

?2? ?????????????????????

?3? ???????????????????????

?4? ??????????????????????

?5? ???????????

?6? ?????????????????

?7? ??????????????????????

?8? ????????????????????????

5.???

(1)??2

3;(2)??14;(3)???3?;(4)???6.5?? ?2??1?

6.???

(1)?6??5;(2)?3.3??2.1; (3)?4.5??1;(4)3112??2

3?

?????


?1.2.4?????????????
?????http://www.850500.com/news/18839.html
?????,??!
您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

Archiver|手机版|小黑屋|Discuz! X

GMT+8, 2026-3-7 18:48 , Processed in 0.406608 second(s), 19 queries .

Powered by Discuz! X3.5

© 2001-2025 Discuz! Team.

快速回复 返回顶部 返回列表