Mathematics
Senior High
階差数列について
2≦n を求めるのでa2、k=2スタートだと思ってるんですが、一般的な解き方はa1、k=1がスタートなのが理解出来なくて…解説よろしくお願いします🙇♀️
Best EXEL Amor-An= bu
階差数列
u=2
A2 A3 A4
A4
Amy Aw Aute
be
b3
bat
bu
U-1
An = A ₂ + 12/27/1 b₂ (1²3)
K=2
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