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文[1]提出了使且的x的个数问题．本文用计算机证明了如下：定理设且则有其中，m=7时的24个是N_9中元素的倍数问题@李培逢$广西八一铁合金总厂中学1郭富喜.“由1,2,...,9组成几位数”的集合N9探奇。中学数学教学参考,1996,11
The number [1] of the sum of x is proposed in [1]. This paper is proved by computer as follows: Theorems are set and there are, where 24 when m=7 is a multiple of the elements in N_9@Li Peifeng$Guangxi Bayi Ferroalloy Plant Secondary School 1 Guo Fuxi.“ consists of 1,2 ,...,9 makes up a collection of several digits.” Secondary Mathematics Teaching Reference, 1996, 11