已知:2△3=2+22+222=246,3△4=3+33+333+3333=3702,计算5△3,3△2
快
人气:299 ℃ 时间:2020-03-21 14:14:10
解答
已知:2△3=2+22+222=246,
3△4=3+33+333+3333=3702,
则5△3=5+55+555=615
3△2=3+33=36
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