a,( x + 1 ) ( xy – 1 ) = 5 b, ( xy – 3 ) ( y + 2 ) = 4 31/07/2021 Bởi aihong a,( x + 1 ) ( xy – 1 ) = 5 b, ( xy – 3 ) ( y + 2 ) = 4
a)suy ra (x+1) va (xy-1) thuoc U(5)=+-1 +-5 suy ra x+1=-1 x=0 x+1=1 x=2 x+1=5 x=4 x+1=-5 x=-6 xy-1=1 …tuong tu bn hay tu lam tiep Bình luận
a)suy ra (x+1) va (xy-1) thuoc U(5)=+-1 +-5
suy ra x+1=-1
x=0
x+1=1
x=2
x+1=5
x=4
x+1=-5
x=-6
xy-1=1
…tuong tu bn hay tu lam tiep