数列{an}满足a1=1,an=3n+2an-1(n≥2)求an
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数列{an}满足a1=1,an=3n+2an-1(n≥2)求an
数列{an}满足a1=1,an=3n+2an-1(n≥2)求an
数列{an}满足a1=1,an=3n+2an-1(n≥2)求an
我简单的提示下思路:令bn=an+3n+6 然后带入原方程可得:bn=2bn-1然后就自己动手丰衣足食了!思路就是构造等比数列,构造用待定系数法就ok了
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