Mathematics
Senior High
Resolved
この計算がわかんないです
Unti
(2) n≧2 のとき,
bn=bot
=0+
4
n-1
(
2
k+1
2/
1-(-1/2)^
1+1/2
71-
1/12- (-/1/
これは, n=1のときも含む.
119
初項 1/11 公比 - 12
4'
項数 n-1の
等比数列の和
吟味を忘れずに
演習
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