(2012•温州一模)已知数列{an}满足a1=5,anan+1=2n,则a1a3=( )
已知数列{an}满足a1=1,an+1=2an+1(n∈N*). 若函数bn=anan+1,求数列
已知数列{an}中,a1=1,anan+1=2n(n∈N*)
已知数列{an}满足:a1=1,a2=a(a>0),数列{bn}满足:bn=anan+2(n∈N*)
已知数列{an}中,a1=3/5,anan-1+1=2an-1(n>等于2,n属于N),数列{bn}满足bn=1/an-
如果数列{an}满足a1=2,a2=1,且an−1−anan−1=an−an+1an+1(n≥2),则这个数列的第10项
已知数列{an}满足anan-1=an-1+(-1)n次方(n≥2),且a1=1,则a5/a3=
己知数列{an}满足a1=1,an+1=2n+1anan+2n (n∈N*),
已知数列an中,a1=2,an+1=an+2(n属于N*)数列bn满足bn=1/anan+1,求bn前十项和
已知数列{an}满足a1=1,An+1=an/1+2an(n属于N*) 问若若a1a2+a2a3+……+anan+1>1
已知数列{an}中(1)a1=1,且anan+1=2^n,求通项公式
如果数列{an}满足a1=2,a2=1,且(an-1-an)/(anan-1)=(an-an+1)/(anan+1)(n
已知a1=3,an-anan+1=1(n∈N+),An表示数列{an}的前n项之积,则A2010=______.