问题 解答题
2×2+4×4+6×6+…+50×50
1×1+2×2+3×3+…+25×25
答案

2×2+4×4+6×6+…+50×50
1×1+2×2+3×3+…+25×25

=

(1×1+2×2+3×3+…+25×25)×2
1×+2×2+3×3+…+25×25

=2.

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问答题 简答题