我解不开 help me!

分类: 作业答案 • 2022-01-09 18:03:33

问题描述：

我解不开 help me!
有一个长方体,它的长,宽,高是三个连续的自然数,且体积是504立方厘米,求这个长方体的表面积.
将240苹果平均分成若干份,有多少种不同的分发?

答

1.分解504的因数为：504=7*2*2*2*3*3=7*8*9,然后求表面积就成了.
2.240=2^4*3*5,该数是7个质数相乘,从中任取1、2、3、4、5、6、7个数字共有多少种取法,然后减去重复的,再加上一个分一份的方法,就是总方法数.

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动物是多种多样的,根据有无脊椎可以分为?

我解不开 help me!

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