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Huỳnh Anh Phương

09/07/2018 at 11:13
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Find x; y , know that x and y is postive ỉterger to be satisfied 2 calculations:

1) xy = yx

2) \(x\times y=8\)

 
 


Find x


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  • ...
    Lê Quốc Trần Anh Coordinator 13/07/2018 at 04:10

    Because x,y are positive integers and \(x\times y=8\)

    => \(\left\{{}\begin{matrix}x=1;y=8\\x=2;y=4\\x=4;y=2\\x=8;y=1\end{matrix}\right.\)

    Because \(x^y=y^x\)

    => \(\left\{{}\begin{matrix}x=2;y=4\\x=4;y=2\end{matrix}\right.\)

    Huỳnh Anh Phương selected this answer.
  • ...
    Kalila Thao Van 30/01/2019 at 06:05

    i think the first x and y are 2 . the second i don't do it


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