Mathematics
Senior High
最後n=1代入したら初項の2になりますか?
11
ダ種に ane
) 2, 3, 5, 9, 17,
|248
このカりへP差々なり 71,2 4.8
一般夏てbん とろると bn: 1-2^!
hz2のと2
5an:ar , be = ai+E2y
2倍 な7
h-
bんこ
X-1
ai+E2ト)
-2け
2-1
n=lのとき
an- 2'!→
*2t 2^"-1
an
-2^4 1
そ
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1ですね ありがとうございます