tim cac so x y z nguyen duong thoa man x3+3x2+5=5y va x+3=5z
cho x,y,z la cac so huu ti duong thoa man x+1/yz y +1/xz z+1/xy la cac so nguyen tim gia tri lon nhat cua bieu thuc A=x+y^2+z^3
tim cac so nguyen x ,y,z thoa man /x-y/+/y-z/+/z-x/=2015
tim cac so nguyen to x y z thoa man 3(x+y+z)=xyz
cho x,y,z la cac so nguyen duong va x+y+z la so le, cac so thuc a,b,c thoa man (a-b)/x=(b-c)/y=(a-c)/z. chung minh rang a=b=c
cho a,b,c,x,y,z la cac so nguyen duong thoa man a^x=bc;b^y=ac;c^z=ab. chung minh xyz-x-y-z=2
tim cac so nguyen x , y , z thoa man :
/x-y/+/y-z/+/x-z/=2015
nham la tri tuyet doi
c1: Tap hop cac gia tri nguyen cua x thoa man \(\left(x+\frac{5}{4}\right)\left(x-\frac{19}{7}\right)\)<0
c2: Neu x,y la cac so nguyen thoa man 2xy+4y=6 thi y co the nhan nhung gia tri nam trong tap hop nao
c3: tim 3 so x,y,z biet x+y=8,x+z=10,y+z=12
C4: Gia tri cua x thoa man (x+3)^2=25 va x^3>0 la x=
tim cac so huu ti x y thoa man x+y va 1/x +1/y nguyen duong
