a1=1,an+1=an平方+an(n∈n*)数列bn满足bn=1/1+an设tn=b1b2...bn试用an+1表示t
已知等差数列{an}中,an=2n-24 若数列{bn}满足an=log2bn,设Tn=b1b2...bn,且Tn=1,
已知数列an是一个以q为公比的等比数列,设bn=1/an,试用an.q表示数列bn的前n项之和Tn
设bn=(an+1/an)^2求数列bn的前n项和Tn
已知数列{an}满足a1=1,a2=2,an+2=(an+an+1)/2,n∈N*.令bn=an+1-an,证明{bn}
an=3*2^(n-1),设bn=n/an求数列bn的前n项和Tn
对于数列{an},取bn=an+1-an,{bn}是公差为6的等差数列,试用a1,b1和n表示an
已知数列{an}和{Bn}满足a1=2 an-1=an(an+1-1) bn=an-1 n∈N+
设数列{An}和{bn}满足A1=1/2,2nA(n+1)=(n+1)An,且Bn=ln(1+An)+1/2(An)2,
设数列{an},{bn}满足a1=1/2,2na(n+1)=(n+1)an,且{bn}=ln(1+an)+1/2an^2
数列 an=2n-1 设bn=an/3^n 求和tn=b1+..bn?
已知数列{an}满足a1=2,an=2an-1+2(n∈N*,且n≥2)若数列{bn}满足bn=log2(an+2)设T
在数列{an},{bn}中,a1=2,b1=4且an,bn,an+1成等差数列,bn,an+1,bn+1成等比数列(n∈