BN-V11UBN-V12BN-V12U BN-V140UBN-V14UBN-V15 BN-V18UBN-V20BN-V20U BN-V20USBN-V22BN-V22U BN-V24UBN-V25BN-V25U BN-V400BBN-V400UBN-V65 BNV60U PANASONIC BP-12BP-15BP-17 BP-18HHR-V20A/1BHHR-V214A/K HHR-V40A/1BPV-213APV-214A ...
已知数列{an}的前n项和为Sn.且满足Sn=1-an.各项为正数的数列{bn}中.对于一切n∈N*.有nk=11bk+bk+1=nb1+bn+1.且b1=1.b2=2.b3=3.(1)求数列{an}和{bn}的通项公式,(2)设数列{anbn}的前n项和为Tn.求证:Tn<2.
a<k>=(a1+a<2k-1>)/2>=√(a1*a<2k-1>)=√(b1*b<2k-1>)=bk,∴ak>=bk(当公差为0时取等号).
已知数列{an}的通项an=2n-1.现将其中所有的完全平方数抽出按从小到大的顺序排列成一个新的数列{bn}.(1)若bk=am.则正整数m关于正整数k的函数表达式为m=2k2-2k+12k2-2k+1(2)记Sn是数列{an}的前n项和.则Snnbn 能取到的最大值等于11.
百度试题 结果1 题目12.如图12-Z-11,在△PAB中,∠A =∠B,M,N,K分别是PA,PB,AB上的点,且AM=BK,BN=AK.若∠MKN=44°,则∠P的度数为( )A.44°B.66°C.88°D.92°相关知识点: 试题来源: 解析 12.D 反馈 收藏
美国亚马逊 Braun Mens BN0095BKSLBKG Prestige Analog Display Swiss Quartz Black Watch: Watches历史价格和网友评论,海淘商品名 Braun Mens BN0095BKSLBKG Prestige Analog Display Swiss Quartz Black Watch: Watches
即 1 bk+k= 1 bk− 1 bk+1.从而有 n k=1 1 bk+k= 1 b1− 1 bn+1≤ 1 b1=1.②(6分)由(1)和(2)即得In<1.综合得到 1 2≤In<1.左边不等式的等号成立当且仅当n=1时成立.(7分)(II)不妨设 an+ x 2n= 3 2(an−1+ x 2n−1)(n≤2)即...
PURPOSE:To provide the title medium enabling nigh-efficiency production of a fungus for producing mushrooms having uniform quality and characterized in that more than half of the medium-constituting solid material has particle size falling within a specific range. CONSTITUTION:50wt.% or more of the...
BN-V11UBN-V12BN-V12U BN-V140UBN-V14UBN-V15 BN-V18UBN-V20BN-V20U BN-V20USBN-V22BN-V22U BN-V24UBN-V25BN-V25U BN-V400BBN-V400UBN-V65 BNV60U MULTI-FIT(H) FIT HITACHIFIT PANASONICFIT SHARP MULTI-FIT(S) FIT PANASONICFIT SAMSUNGFIT SHARP ...