已知正项等差数列{an}满足a3*a4=117,a2+a5=22,求通项an
已知正项等差数列{an}满足a3*a4=117,a2+a5=22,求通项an
等差数列{An}的前n项和为Sn,且满足A3*A4=117,A2+A5=22 求通项An ;若数列{Bn}是等差数列,且
已知公差大于零的等差数列{an}的前n项和为Sn,且满足:a3•a4=117,a2+a5=22.
已知公差大于零的等差数列{an}的前n项和Sn,且满足a3*a4=117,a2+a5=22
已知公差大于零的等差数列{an}的前n项和为Sn,且满足:a3*a4=117,a2+a5=22
已知公差数列大于零的等差数列{an}的前n项和为Sn,且满足a3*a4=117,a2+a5=22
在等差数列{an}中,已知a2+a3+a4+a5=34,a2*a5=52,
已知公差大于零的等差数列an满足a3•a4=48 a2+a5=14 求通项an 若Bn=(根号2)^an 求
已知等差数列{an}满足a2+a4=4,a3+a5=10,求{an}的通项公式及{an}的前n项和sn
已知数列an为等差数列,an=n,则a1*a2-a2*a3+a3*a4-a4*a5+...-a100*a101=
已知公差大于零的等差数列{an}的前n项为Sn,且满足a3*a4=117,a2+a5=22.
已知等差数列{an}满足:a3+a4=16,a4+a5=20,{an}的前n项和为Sn