Mathematics
Senior High
Resolved
∑の計算です
2、3、4番が合っているか確認をお願いします🙇♀️
25
次の和を求めよ。
15
(1) 22
k=1
10
(2) k
k=1
8
Ž k²
k=1
(4)
Σ k³
k=1
練251
1/12
(1
Ek
-
l
1
2 x (5 306
=h (hel) = √x²= (tott)
{ F² = { = n(n+1) } ² =
= 45
(=
イク
24
12
204.
93 17
9 & 1²³ = = n(nel) (2n+ 1) = x(+) ([+++)
6
= 4 x ³ x 19 = 209₁
3
31
>
2
{ = x6 (6+1)] ² = (3²9) ²
= 49/
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