Σの計算 演習14
nΣk=1 { k/n + 1/(2n+1) }k2
1 + nΣk=1 ( 3k +1 )
nΣk=1 ( 3k /2 +k -3/2 )
nΣk=1 (-12k2 +6k-1 )
2nΣk=1 { k2 +(2/3)k }
2nΣk=1 ( 2k+1/2 )
nΣk=1 { k/n + 1/(2n+1) }k2
1 + nΣk=1 ( 3k +1 )
nΣk=1 ( 3k /2 +k -3/2 )
nΣk=1 (-12k2 +6k-1 )
2nΣk=1 { k2 +(2/3)k }
2nΣk=1 ( 2k+1/2 )