Question
The product of $n$ positive integers is 1 , then their sum is a positive integer, that is(A) equal to $]$(B) equal to $n+n^{2}$(C) divisible by $n$(D) never less than $n$
Step 1
.., x_n$. According to the problem, their product is 1, so we have $x_1 \cdot x_2 \cdot ... \cdot x_n = 1$. Show more…
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