数列an中,a1=1,当n大于=2时,sn满足sn方=an(sn-1) 证明1/sn是等差数列
数列an中,a1=1,当n大于=2时,sn满足sn方=an(sn-1) 证明1/sn是等差数列
数列an中,a1=1,当n大于等于2时,其前n项和满足sn^2=an(sn-1) 证明:数列{1/sn}是等差数列
已知数列an中,a1=1,当n大于等于2时,sn=an(1-2/sn).求证1/sn是等差数列
数列{an}中,a1=1,an=2Snˆ2/(2Sn-1)(n大于等于2) 1.证明{1∕Sn}是等差数列 2
在数列{an}中a1=1Sn是其前几项和,当n>=2时,Sn与an满足关系式2Sn^2=an(2Sn-1)证明{1/Sn
数列an ,a1=1,当n>=2时,an=(根号sn+根号sn-1)/2,证明根号sn是等差数列,求an
在数列an中,Sn是数列an前n项和,a1=1,当n≥2时,sn^2=an(Sn-1/2) (1)证明1/Sn为等差数列
在数列{An}中,已知A1=1,An=2Sn^2/(2Sn-1),(n>=2),证明{1/Sn}是等差数列,并求Sn
数列{an}中,a1=1,当n大于等于2时,其前n项的和Sn,满足Sn的平方=an(Sn-1)
已知数列{an}的前n项和为Sn,且满足Sn=Sn-1/2Sn-1 +1,a1=2,求证{1/Sn}是等差数列
已知数列{an}的前n项和为Sn,且满足an+2Sn*Sn-1=0,a1=1/2.求证:{1/Sn}是等差数列
已知数列{an}中的前几项和为Sn且满足a1=0.5,an=-2Sn*S(n-1).证明数列{1/Sn}为等差数列,求S