已知数列{an}中,a1=2.a2=10 dm对任意n属于N*有a(n+2)=2a(n+1)+3an成立.(1)若{a(n+1)+xan}是等比数列,求x的值.(2)求数列{an}的通项公式
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![已知数列{an}中,a1=2.a2=10 dm对任意n属于N*有a(n+2)=2a(n+1)+3an成立.(1)若{a(n+1)+xan}是等比数列,求x的值.(2)求数列{an}的通项公式](/uploads/image/z/1389228-60-8.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0%E5%88%97%7Ban%7D%E4%B8%AD%2Ca1%3D2.a2%3D10+dm%E5%AF%B9%E4%BB%BB%E6%84%8Fn%E5%B1%9E%E4%BA%8EN%2A%E6%9C%89a%28n%2B2%29%3D2a%28n%2B1%29%2B3an%E6%88%90%E7%AB%8B.%281%29%E8%8B%A5%7Ba%28n%2B1%29%2Bxan%7D%E6%98%AF%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E6%B1%82x%E7%9A%84%E5%80%BC.%282%29%E6%B1%82%E6%95%B0%E5%88%97%7Ban%7D%E7%9A%84%E9%80%9A%E9%A1%B9%E5%85%AC%E5%BC%8F)
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