数学和英语问题

来源:百度知道 编辑:UC知道 时间:2024/06/14 13:50:40
1.若xy>0,z<0,那么xyz=( )0
2.1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256=( )

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1.我能看一看你的新书包吗?

( )I( )a( )( )your new bag?

2.我最喜欢的电影明星是李连杰。

My( )( )( )Jet Li.

翻译:I ask you to drnk up another cup of wine;Once out of the Pass,you will find no old friends.
( )

令m=1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
两边同时乘2,得:
2m=1+1/2+1/4+1/8+...+1/128
两式相减,得:
m=1-1/256=255/256

另解:
1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256
=(1-1/2)+(1/2-1/4)+(1/4-1/8)+...+(1/128-1/256)
=1-1/2+1/2-1/4+1/4-1/8+...+1/128-1/256
=1-1/256
=255/256
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1.我能看一看你的新书包吗?

(May/Can/Could)I( have )a(look)(at)your new bag?

2.我最喜欢的电影明星是李连杰。

My(favourite)(movie)(star's)Jet Li.

翻译:I ask you to drink up another cup of wine;Once out of the Pass,you will find no old friends.
(我请你再喝一杯酒;一旦摆脱了过去,你就找不到老朋友了。)

1. xyz<0
2. 255/128

1.May I have a look at your new bag?

2.My favorite movie star is Jet Li.

我劝你再喝一杯酒;一旦走出了这里,你会再也找不到任何老朋友。(劝君更进一杯酒,西出阳关无故人)

1 小于 2 255/256
1 can have look at
2 favorite actor is
劝君更尽一杯酒 西出阳关无故人

1. <
xy得负,z是正,正负