Mathematics
Senior High
2番の場合どっちらでといた方がいいですか？
どっちとも合ってますか？
問| 13 1から 100 までの自然数のうち, 次のような数の和を求めよ。
(1) 7の倍数
(2) 7で割って2余る数
1節 等差数列と等比数列
Ani 7n+ 2
an 24 (n-1)7
7n+2 s(00
7n-5
7nf 9P
n:(4
7n-5(0o
n;14
7n (05
nt15
S4314 129+114-1777
h 5
7.184
91)
S6: 16122415-1)
7. (09
15(44 98)
763
(5. 102
(5.51= 765
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