设(a₁/b₂)=(a₂/b₂)=·······=(an/bn) (a&
高一数列题(+15)数列{An}满足A1=1,A(n+1)=An+2(1)设Bn=1/An·A(n+1),求数列{Bn}
第一题:非零向量a,b满足a·b=0,则有(B)A.a//b B.a⊥b C.a=入b D.a+b=0第二题:设a,b,
求过程·设集合A={1,a,b},B={a,a ,ab},且A=B,求实数a,b的值
设(axb)·c=2,则[(a+b)x(b+c)]·(c+a)=
已知等比数列{an}的首项a1>0,公比q>0.设数列{bn}的通项bn=a(n+1)+a(n+2),数列{an},{b
设向量a=(cos23,cos67),b=(cos53,cos37),a·b=?
已知数列an,bn,cn满足[a(n+1)-an][b(n+1)-bn]=cn
设a1=2,a2=4,数列{bn}满足:bn=a(n+1)-an,b(n+1)=2bn+2.
急 设A1=2,A2=4,数列Bn满足:Bn=A(n+1)-An,B(n+1)=2Bn +2
急 设A1=2,A2=4,数列BN满足:Bn=A(n+1)-An,B(n+1)=2Bn+2
设A1=2,A2=4,数列{Bn}满足:Bn=A(n+1) –An,B(n+1)=2Bn+2.
设向量a,b,c满足|a|=|b|=1,a·b=1/2,(a-c)(b-c)=0,则|c|的最大值等于