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tim cac so nguyen x,y,z bt {5x-7} mu 2 cong {6 tru 5y } mu2 cong {5z } mu 2 bang 10
tim x y thuoc z biết | x -1| + |y | = 2
( x -1) mu 2 + y mu 2 = 4
tim x y thuoc z biet x mu 2 cong y nhan x cong y mu 2 bang x mu hai nhan y mu hai
cac ban oi giup minh voi
1.tim a,b thuoc Z,biet:a.(2b-3)=-6
2.cho x,y thuoc Z thoa man x mu 2 +y mu 2 chia het cho 3.chung to x va y chia het cho 3.
Tim so nguyen x,y biet
a) (x+5) mu 2 + (2y - 8 ) mu 2 = 0
b)(x + 3).(2y - 1 ) = 5
cau 1,(n^2-7)\(⋮\)n+3
cau 2 tim x;y;z
bietx-y=-9
y-z=-10
z+x=11
1. tim cac cap so nguyen duong (x, y) sao cho:
2 x3 + xy = 11
2. tim cac cap so nguyen duong (x, y, z)sao cho:
x + y + z = x*y*z
3. tim x thuoc z, biet;
|x| = -2003
|x| = |-2003|
minh dang can gap lam. chieu mai phai nop rui
tim cac so nguyen x,y,z biet y^2=y-1; x^2=x-1; z^2=z-1
tim x,y,z sao cho x^2+y^2+z^2=xyz x,y,z nguyen to
