Mathematics
Senior High
分数の分母にも分子にも分数が入ってて計算の仕方がわかりません。
教えてください。
(1) 初20,3,項5
S5=20.{35-1}
103-1
20 (243-1)
2
=2420
3.3.3.3.3
99
81
x 3
243
(2) 初10,
56=10
列題6 (1)次の等比数列の和Sを求めよ。
4
1/3/3(53)(3) (13)
初1,公言、項5
S = 1 {1-(3) he
S = 1 - 1²/31
=
1-
101
(+
=-21
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