数列2,4,8,14,22表达式
数列2,4,8,14,22表达式
数学人气:526 ℃时间:2020-01-24 03:18:56
优质解答
2=1²-1+24=2²+0=2²-2+28=3²-1=3²-3+214=4²-2=4²-4+222=5²-3=5²-5+2…………规律:从第1项开始,每一项都等于项数的平方减去项数的差,再加2第n项:n²-n+2...😘
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