问题
解答题
已知集合A={x|(x-2)(x-8)≤0},B={x|
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答案
A=x|(x-2)(x-8)≤0,可得A={x|2≤x≤8};B={x|
<0}可得B={x|1<x<6}x-1 x-6
所以A∪B={x|2≤x≤8}∪{x|1<x<6}=(1,8];
(CUA)∩B={x|x<2或x>8}∪{x|1<x<6}=(1,2).
已知集合A={x|(x-2)(x-8)≤0},B={x|
|
A=x|(x-2)(x-8)≤0,可得A={x|2≤x≤8};B={x|
<0}可得B={x|1<x<6}x-1 x-6
所以A∪B={x|2≤x≤8}∪{x|1<x<6}=(1,8];
(CUA)∩B={x|x<2或x>8}∪{x|1<x<6}=(1,2).
根据下列的汉语选择正确的英语。 |
( ) 1. 试一试 ( ) 2. 收拾衣服 ( ) 3. 摆饭桌 ( ) 4. 做饭 ( ) 5. 在家 | A. do a try A. put away the clothes A. lay the table A. make the meals A. on the home | B. play a try B. put on the clothes B. put the table B. do the meals B. at home | C. have a try C. clean the clothes C. set the table C. cook the meals C. at the home |