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(1){an}与{bn}不是无穷互补数列.理由:由an=2n-1,bn=4n-2,可得4∉A,4∉B,即有4∉A∪B=N*,即有{an}与{bn}不是无穷互补数列;(2)由an=2n,可得a4=16,a5=32,由{an}与{bn}是无穷互补数列,可得b16=16+4=20,... (1){an}与{bn}不是无穷互补数列.由4∉A,4∉B,4∉A∪B=N*,...
(2012•徐汇区一模)如图所示:矩形AnBnPnQn的一边AnBn在x轴上,另两个顶点Pn,Qn在函数f(x)= 2x 1+x2(x>0)的图象上(其中点Bn的坐标为(n,0)(n≥2,n∈N*),矩形AnBnPnQn的面积记为Sn,则 lim n→∞Sn=___.作业帮用户2017-11-07 举报 用这款APP,检查作业高效又准确!扫二维码下载作业帮 拍照搜...
fabpot committed Nov 13, 2024 1 parent aeb0926 commit 8eaace1 Showing 1 changed file with 19 additions and 0 deletions. Whitespace Ignore whitespace Split Unified 19 changes: 19 additions & 0 deletions 19 CHANGELOG-7.2.md Original file line numberDiff line numberDiff line change @@ -7,...
1. 答语的意思是“Mr. King是我的新老师。”由此可知问句在问“谁是你的新老师?”对人提问用who,所以答案是Who is your new teacher? 2. 答语的意思是“房子们是小的。”由此可知问句在问“那些房子们什么样”对某物看起来如何提问用what … like? 所以答案是What are the houses like? 3. 答语的意...
More than 300 schools in Shanghai suspended classes on Friday morning, affecting 280,000 students, in response to Typhoon Pulasan, according to the local flood control office. As of 9am, the city's average precipitation rea...