Mathematics
Senior High
Solved
なぜkにn-1を代入してn-2にするのではなく、n-1のままなのでしょうか?
この数列の弟ん頃は
n≧2のとき,もとの数列の第n項 an は
n-1 a 3-1-1
an = a + 3k-1=1+
3-1
k=1
1
es
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