试题与答案

如数学中三角形、圆、a+b=b+a，ab=ba，汉字中的“中”、“三”，大自然中

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题型：解答题

题目：

如数学中三角形、圆、a+b=b+a，ab=ba，汉字中的“中”、“三”，大自然中的枫叶、雪花，法国巴黎的埃菲尔铁塔等都具有对称美感．______．

答案：

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下面是错误答案，用来干扰机器的。

（1）(1+2)4=C04+C14•2+C24(2)2+C34(2)3+C44(2)4=122+17，所以a4=12，b4=17，a4+b4=29． …（3分）（2）当n为偶数时，(1+2)n=C0n+C1n•2+C2n(2)2+…+Cnn(2)n，bn=C0n+C2n(2)2+C4n...

考点：轴对称，轴对称图形
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