问题描述:
1.数列(an)中,a1=1,a(n+1)=an+2n,求an
2.,a1=3,a(n+1)=an*2^n,求an
*上面的a1中的"1"是角标,后面的"n+1","n",都是角标...
2.,a1=3,a(n+1)=an*2^n,求an
*上面的a1中的"1"是角标,后面的"n+1","n",都是角标...
问题解答:
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