Mathematics
Senior High
丸で囲んだ部分式変形がよく分かりません。
教えてくだい🙇♂️
n
Sn = Zakk til 17.
k=1
Sn-2an-2n+ 5.
Sn+1 = -2Anti-2 (h+1)+5 (h²0)
7 Sn=-2an-2h+5
An+T=-2an+l+ 2an-2.
Aml = ²/3-an - ²3/
An
2
2.
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