2022湖南省金太阳答案

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23解:(1)M(x)=2x-1 3-2x|22x-1) (3-2x)|=2,当且仅当≤x≤时,等号成立,所以h(x)=2,只需a≤2所以实数a的最大值为25分(2)解法一:由柯西不等式,o(x)=√2x- √3-2x-1xx-l 1×-2xsh2 1)2x-1 3-2x)=2,当且仅当√3-2x=2x-1,即x=1时,等号成立,所以(x)的最大值为2解法二:由均值不等式,[ox)=2 2y2x-13-2x)s2 (2x-1) (3-2x)=4,当且仅当3-2x=2x-1,即x=1时,等号成立,所以[(x)≤4因为(x)>0,所以0<9(x)≤2,所以q(x)的最大值为210分

Li HI第二节The next day when i arrived at school. I didn't findAlice. I felt everything was very dark. I had a bad feelingwhen I was looking for her. I found some guys werebothering Alice, and this time they were hitting her andpulling her hair. I heard one of the guys say, "You have togive me all your homework, or we'll keep on hitting youI did not know what to do. I was very worried, so mydecision was to call the policeWhen the police arrived, the guys who were bullyingAlice were caught. We all had to go to the school office. Iwas in the office as a witness. Alice was a victim, andhose who bullied her were guilty. When my parentsarrived, theyfelt piroud of me. Alice told her parenteverything. She was extremely grateful and kept thankingme. From that day on, I got a best friend for life, andAlice learned how to defend herself