2024四川省成都市2021级高中毕业班第二次诊断考试理综试卷及参考答案

2024四川省成都市2021级高中毕业班第二次诊断考试理综试卷及参考答案,答案汇总网收集关于2024四川省成都市2021级高中毕业班第二次诊断考试理综试卷及参考答案的相关科目试卷及其答案，更多其他试卷答案请关注本网站！

Dear Mr smithI'm writing to invite you to watch a documentary aboutChinese tea culture, which will be shown in the City Library fron9amto11 am this Sunday.【高分句型】(提出邀请,说明活动的內容,时间和地点)It is said the documentary is in Chinese, with Englishsubtitles. Moreover, the history of tea as a drink inChina will be talked about in the documentary, as welI as the important role tea plays in foreign trade as a commercial product.【高分句型二】(纪录片主要内容I'm sure this documentary will contribute a lot to your understanding of Chinese tea culture. Therefore, if you're available this sunday and interested in this documentary, please e-mall me, so we can decide ourmeeting time and place.(商量细节)Looking forward to your reply.(期盼见面)Yours sinerelyLi Hua

21.(本小题满分12分)解:(1)即k<(x+1)f(x)(x+1)+(x+1)ln(x+1令h(x)(x+1)+(x+1)ln(x+1)∴h(x)=x-1-ln(x+1)令g(x)-x-1-mn(x+1)g(x)=11成∠知g(x)在(0.1∞)单洞递增g(05=1c,g(1<0(2)0,g(9)0=故存在=(23)使得一即x。一1从而当x>x时有g(x少(与开9h()>0:h(x)在(xa,3)单调递增半下利时,有g()下8(x)=)<0÷4(x)在(2x)单调递减为h(x0+1)+(x0+1)hn(xo+1)(x0+1)+(x0+1)(x2-1)+∈(3,4)k≤3.k=36分(2)由(1)知1+1n(x+17x恒成立l=2x十1令x=n(n+1)(ncN*)则ln[1+n(n+1)]>2-31=2-3n(nthn(1+1×2)+h(1+2×3)+……+n[1+n(n+1]>2n-3(1-)+(+(nn+I=2n-3(1n+1[1+1×2)1+2×3)…41+n(m+1)>2n-3(1+1×21(1+2×3)…{1+n(n+1]>12分,

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