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Câu 12:

Cho $k,\,n\,\left( {k < n} \right)$

Câu 12: Cho k, n (k<n)k,\,n\,\left( {k < n} \right)k,n(k<n) là các số nguyên dương bất kì. Mệnh đề nào sau đây đúng?

Thông tin câu hỏi

Câu 12:

Cho $k,\,n\,\left( {k < n} \right)$ là các số nguyên dương bất kì. Mệnh đề nào sau đây đúng?