已知等差数列{an}中,公差d>0,前n项和为Sn,且满足a2*a3=45,a1+a5=18
已知等差数列{an}中,公差d>0,前n项和为Sn,且满足a2*a3=45,a1+a5=18
已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2×a3=45,a1+a4=14
已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2*a4=45,a1+a5=14
已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足:a2*a3=45,a1+a4=14
已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2·a3=45,a1+a4=14
高中等差数列请帮我!已知等差数列{an}中公差d>0,其前n项和为Sn,且满足a2.a3=45,a1+a4=14.(1)
已知等差数列{an}中,公差d>0,其前n项和为Sn,且满足a2·a3=45,a1+a4=14若c=-1/2,
已知等差数列an的公差d≠0,他的前n项和为Sn,若S5=25,且a1,a2,a5成等比数列
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
大侠们,等差数列中,公差d>0,前n项和为Sn,且满足a2*a4=45,a1+a5=14,求(1)数列{an}通项公式及