已知函数f(n)=n2,当n为奇数时−n2,当n为偶数时且an=f(n)+f(n+1),则a1+a2+a3+…+a100等于()A.0B.100C.-100D.10200 更新时间:2024-04-27 22:54:28 问题描述:已知函数f(n)= n2,当n为奇数时−n2,当n为偶数时且an=f(n)+f(n+1),则a1+a2+a3+…+a100等于() A.0 B.100 C.-100 D.10200