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发表于:2018-11-15
TheChangesofANFExpressionofCardiacMyocytesinExhaustedTrainingRats;Experimentstudyontrainingratbloodlacticacid,ANF,cortisolandinternalorgansindexlevelinfluencedbyMoxa;Effe...
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发表于:2020-08-03
问题详情:设函数f(x)=8lnx+15x﹣x2,数列{an}满足an=f(n),n∈N+,数列{an}的前n项和Sn最大时,n=()A.15 B.16 C.17 D.18【回答】B【考点】数列的求和.【分析】求出f(x)的导数,由导数大于0,可得增区间...
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发表于:2020-09-13
问题详情:已知函数且an=f(n)+f(n+1),则a1+a2+…+a99等于()A.0 B.100 C.﹣101 D.﹣99【回答】C【考点】8E:数列的求和;3T:函数的值.【分析】函数且an=f(n)+f(n+1),可得a2n=f(2n)+f(2n+1)=4n+1,a2n﹣1=f(2n﹣1)+f(2...