(1)홀수의 합을 점화식 또는 일반항으로 나타내어라
(2)홀수중 제곱수가 되는것이 있는데 그 수들의 합을 점화식 또는 일반항으로 나타내어라
(3)이제 홀수들의 합중 제곱수가 있는것들은 빼서 나머지 것들을 더한다.점화식 또는 일반항으로 나타내어라.
{1번과 2번을 구했다면 3번은 자동으로 풀어진다.}
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