Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: tim x , y nguyen biet : x – 1/y – 4/xy = 1

Toán Lớp 6: tim x , y nguyen biet : x – 1/y – 4/xy = 1

Comments ( 1 )

  1.                                              Bài làm
    x4−1y=12=>xy4y−44y=12=>xy−44y=12
    =>(xy-4).2=4x
    =>xy-4=2x
    =>xy-2x=4
    =>x.(y-2)=4
    Ta thấy: 4=(-1).(-4)=1.4=(-2).(-2)=2.2
    Vì x,y thuộc Z=>x,y-2 thuộc Z
    Vậy (x,y)=(1,6),(4,3),(-1,-2),(-4,1),(-2,0),(2,4)
     

Leave a reply

222-9+11+12:2*14+14 = ? ( )