Tim x, y, z biet
a ) |x-3,5|+ |x+5|=0
b) |x-1| + (y+1)^2 + |z-1|=0
c) ( x-1/3)^2 + (y-2)^2+ (z-1)^2 be hon hoac bang 0
d)(x-z)^2+ (y+x)^2 + (z+1/4)^2 =0
Cac ban giup minh voi minh can gap lam
bai 1 cmr
a)n^3+11n chia het cho 6 voi moi n thuoc Z
b)mn(m^2-n^2)chia het cho 3 voi moi m,n thuoc Z
bai 2 tim x,y thuoc Z
a)(x-1)(3-y)=(-7)
help me
x-1/5 = y+4/-3= z-2 va x - 5y + z = 18
Giup minh voi nha may ban
gia su x=a/m, y=b/m (a,b,m thuoc z, m>0) va x<y.hay chung to rang neu chon z=a+b/2m thi ta co x<z<y.
minh moi hoc lop 7 minh ko hieu bai nay ai giai giup minh voi
1, tìm x,y
a) xy- x - y +1= 0
b) 1/x+1/y = 1/2
giup minh voi
MOI NGUOI GIUP MINH VOI NHA
Tim x thuoc Z biet :
E=6-x/x-2 nhan gia tri nguyen
Tim x , y , z biet: x /y+z+1 = y/ z+x+2 = z/ x+y−3 =x+y+z Cach lam ho minh voi
Cho hai so huu ti x va y voi 0<x=a/b<1, y =a+c/b+c,c thuoc Z. Hay so sanh x va y
Tìm ba số x,y,z biết x×y= -18 ; y×z= 15; z×x=-30
Tra loi giup minh voi nha