如题所述
根据公式 1^2+2^2+3^2+......+n^2=n(n+1)(2n+1)/6
1×1+2×2+3×3+4×4+5×5......29×29+30×30
=1^2+2^2+3^2+4^2+.........+29^2+30^2
=30×(30+1)×(2×30+1)/6
=30×31×61/6
=5×31×61
=155×61
=9155
1×1+2×2+3×3+4×4+5×5......29×29+30×30
=1^2+2^2+3^2+4^2+.........+29^2+30^2
=30×(30+1)×(2×30+1)/6
=30×31×61/6
=5×31×61
=155×61
=9155
温馨提示:答案为网友推荐,仅供参考