等差数列{an}的前n项和为Sn,已知am-1 +am+1 -(am)^2=0,S2m-1=38,求m
等差数列{an}的前n项和为Sn,已知am-1 +am+1 -(am)^2=0,S2m-1=38,求m
等差数列{an}的前n项和为Sn,已知am-1+am+1-am2=0,S2m-1=38,则m等于
已知等差数列{An}的前n项和为Sn,诺m>1,且Am-1+Am+1=(Am)^2,S2m-1=38,则m为多少
等差数列an的前N项和为Sn,已知am-1+am+1-am的平方=0,s2m-1=38
已知等差数列{an}中的前n项和为Sn,若m>1,且am-1+am+1-am²=0,S2m-1=38,则m等于
已知等差数列{an}的前n项和为Sn,若m>1,且am-1+am+1-am2=0,S2m-1=38,则m等于( )
已知等差数列an的前n项和为Sn,若m>1且am-1+am+1-am平方-1=0.S2m-1=39,则m等于
等差数列{An}前n项和是Sn.已知Am_1+Am+1-Am的平方等于零.S2m-1等于38.则m等于
已知等比数列{an}的前n项和为Sn,若am,am+2,am+1(m∈R)成等差数列,试判断Sm,Sm+2,S
数列.已知等差数列{An}中,An≠0,若m>1且Am-1 - Am ^2 + Am+1=0,S2m-1 =38,则m=
已知等差数列{an}前n项和为Sn,若Sm/Sn=m^2/n^2,则am/am的值为?
设等差数列an,bn的前n项的和分别为sn,Tn,m不等于n.(1)若am=n,an=m,求am+n和Sm+n