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数学
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计算100²-99²+98²²-97²+…+2²-1
人气:140 ℃ 时间:2020-01-25 06:42:24
解答
100²-99²+98²²-97²+…+2²-1
=(100^2-99^2)+(98^2-97^2)+...+(2^2-1^2)
=100+99+98+87+...+2+1
=100x(100+1)/2
=5050
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