首项为An,公差为d的等差数列An的前n项和为Sn,已知A7=-2,S5=30.若数列Bn满足An=(B1+2B2+…nBn)/N求Bn通项公
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 00:28:13
xTKo@+VJqw7~ƕ8sܑu ݄SHU%Dii)=>3ꏩb'9/0n) qkޙfv,g+ýͷi%vp{Y~2FL/89, F }3N6єfϳl{xcv,8Mgz7ܯYK5{P+{+[Nj=q= U={81QR,UrUq}x1yD8H6o[VKhgyX<`x*i߷ɸPP3ХV+1+Ǵ0(h2B
5>螟mϚz0/J0
XT&y5ሀi8
qzhހd#m(Y?>-uVv¥jW_sTy}:yٚ< /n'p.y)i "(~ދ`!hSg3nX
TU