设{an}的前n项和为S,已知a1=1,a2=6,a3=11,(5n-8)Sn+1-(5n+2)Sn=a*n+b,n=1
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设{an}的前n项和为S,已知a1=1,a2=6,a3=11,(5n-8)Sn+1-(5n+2)Sn=a*n+b,n=1,2,3...其中a,b为常数 求a,b
高一数学暑假新时空第30页第14题
高一数学暑假新时空第30页第14题
![设{an}的前n项和为S,已知a1=1,a2=6,a3=11,(5n-8)Sn+1-(5n+2)Sn=a*n+b,n=1](/uploads/image/z/92795-59-5.jpg?t=%E8%AE%BE%7Ban%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8C%E4%B8%BAS%2C%E5%B7%B2%E7%9F%A5a1%3D1%2Ca2%3D6%2Ca3%3D11%2C%285n-8%29Sn%2B1-%285n%2B2%29Sn%3Da%2An%2Bb%2Cn%3D1)
a=-20
b=-8
b=-8
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