tim cac so nguyen duong x,y biet
1/2x+1/2y+1/xy=1/2
tim cac so xy nguyen duong biet /x-2y+1/*/x+4y+3/=20
Tim cac so nguyen duong x;y biet: |x-2y+1|.|x+4y+3|=20
de ma suy ra 1 trong 2 ve la uoc cua 20
chi la uoc duong thoi vi cogia tri tuyet doi ma
tim cac so nguyen duong x;y biet |x-2y +1|.|x+4y+3| =20
Tim cac so nguyen duong x,y biet |x-2y+1|.|x+4y+3| = 20
tim cac so nguyen duong x,y biet |x-2y+1| |x+4y+3|=20
Bai 1 : Tim cac so nguyen x , y biet :
a, xy - 2x -3y = 5
b, xy - 2x + 5y = 2
xy-2x-3y+6=5+6
x(y-2)-3(y-2)=5+6
(x-3)(y-2)=11
(x-3)(y-2)=1.11;11.1
nếu (x-3)(y-2)=1.11=> x=4 và y=13
nếu (x-3)(y-2)=11.1=>x=14 và y=3
câu b tương tự
xy-2x+5y-10=2-10
x(y-2)+5(y-2)=-8
.....
nhớ tick nha
Nguyễn Thùy Linh sai vì 3y+6=3(y+2) chứ ko phải 3y+6=3(y-2)
BAI 1 : TIM TAT CA CAC SO TU NHIEN x , y SAO CHO : ( 2x + 1 ) . ( y - 5 ) = 12
BAI 2: a ) TIM SO NGUYEN x VA y, BIET : xy - x + 2y = 3
b) CO SO TU NHIEN NAO MA CHIA CHO 18 DU 12 , CON CHIA CHO 6 THI DU 2 KHONG ?
Tim cac cap so nguyen x,y biet
a,xy=-5
b,(x+2)(2y-3)=8
c,(x-2)^2+(2x-y)^4=0
d,|x|+|y|=1
e,|2x+1|+|y|=4
f,|x-13|+|2y-8|<hoac= 0
g,|x-5|+|y+2|=2
h,|x+3|+|2y+1|=3
tim cac so nguyen x, y thoa man x>y>1 va 2x + 2y + 1 chia het cho xy