因式分解(1²+3²+5²+……+99²）-（2²+4²+……+100²）
人气：405 ℃ 时间：2020-05-04 13:38:53
解答
原式=(1²-2²)+(3²-4²)+...+(99²-100²)
=-(1+2+3+4+.+99+100)
=-5050
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