高二理科数列题:已知数列{a(n)}的前n项和S(n)满足S(n+1)=2S(n)+a,且a1=2,a2=4已知数列{a(n)}的前n项和S(n)满足S(n+1)=2S(n)+a,且a1=2,a2=4.(1)求a值及a(n)(2)若b(n)=(2*t^n)/
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/12 08:03:51
![高二理科数列题:已知数列{a(n)}的前n项和S(n)满足S(n+1)=2S(n)+a,且a1=2,a2=4已知数列{a(n)}的前n项和S(n)满足S(n+1)=2S(n)+a,且a1=2,a2=4.(1)求a值及a(n)(2)若b(n)=(2*t^n)/](/uploads/image/z/13216867-43-7.jpg?t=%E9%AB%98%E4%BA%8C%E7%90%86%E7%A7%91%E6%95%B0%E5%88%97%E9%A2%98%EF%BC%9A%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ba%EF%BC%88n%EF%BC%89%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CS%EF%BC%88n%EF%BC%89%E6%BB%A1%E8%B6%B3S%EF%BC%88n%2B1%EF%BC%89%3D2S%EF%BC%88n%EF%BC%89%2Ba%2C%E4%B8%94a1%3D2%2Ca2%3D4%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ba%EF%BC%88n%EF%BC%89%7D%E7%9A%84%E5%89%8Dn%E9%A1%B9%E5%92%8CS%EF%BC%88n%EF%BC%89%E6%BB%A1%E8%B6%B3S%EF%BC%88n%2B1%EF%BC%89%3D2S%EF%BC%88n%EF%BC%89%2Ba%2C%E4%B8%94a1%3D2%2Ca2%3D4.%EF%BC%881%EF%BC%89%E6%B1%82a%E5%80%BC%E5%8F%8Aa%EF%BC%88n%EF%BC%89%EF%BC%882%EF%BC%89%E8%8B%A5b%EF%BC%88n%EF%BC%89%3D%EF%BC%882%2At%5En%EF%BC%89%2F)
x){zƓ]='=_>
O;\4YOoz>)D:{:kjyٛrΧzv/|m3mdu옒hhkhdkB3 66%>mf02R/&AElABZ%q MR>]}&A