Câu hỏi của nguyễn ngọc lam thanhh

Question

tìm n thuộc Z sao cho n-7 là ước 5

$๖ۣۜN๖ۣۜE๖ۣۜV ๖ۣۜE ๖ۣۜR... · Accepted Answer

Ư(5)=+-1;+-5=>n-7=1=>n=8n-7=-1=>n=6=>n-7=5=>n=12n-7=-5 => n=2KLCâu trả lời: Ư(5)=+-1;+-5=>n-7=1=>n=8n-7=-1=>n=6=>n-7=5=>n=12n-7=-5 => n=2KL

Huyền Trân · Answer

$n-7\inƯ\left(5\right)=\left\{\pm1,\pm5\right\}$$\text{Khi n-7 =1}$$\Rightarrow n=8$$\text{Khi n-7=-1}$$\Rightarrow n=6$$\text{Khi n-7=5}$$\Rightarrow n=12$$\text{Khi n-7=-5}$$\Rightarrow n=2$Câu trả lời: $n-7\inƯ\left(5\right)=\left\{\pm1,\pm5\right\}$$\text{Khi n-7 =1}$$\Rightarrow n=8$$\text{Khi n-7=-1}$$\Rightarrow n=6$$\text{Khi n-7=5}$$\Rightarrow n=12$$\text{Khi n-7=-5}$$\Rightarrow n=2$

Ahwi · Answer

Có $Ư\left(5\right)=\left\{-5;0;5;-1;1\right\}$=> $n-7\in\left\{-5;0;5\right\}$Th1: n - 7 = -5 => n = 2Th2: n - 7 = 0=> n = 7Th3: n - 7 = 5=> n = 12Th4 : n - 7 = -1=> n = 6Th5:  n - 7 = 1=> n = 8$\Rightarrow n\in\left\{12;7;2;6;8\right\}$Câu trả lời: Có $Ư\left(5\right)=\left\{-5;0;5;-1;1\right\}$=> $n-7\in\left\{-5;0;5\right\}$Th1: n - 7 = -5 => n = 2Th2: n - 7 = 0=> n = 7Th3: n - 7 = 5=> n = 12Th4 : n - 7 = -1=> n = 6Th5:  n - 7 = 1=> n = 8$\Rightarrow n\in\left\{12;7;2;6;8\right\}$

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