tim x,y thuoc z biet 25-\(y^2\)=8.(x-2009)^2
tim cac gia tri x y thoa man
a,(x^2-1)(x^2-16)<0 va x thuoc Z
B,1/x-y/8=1/16 va x y thuoc N
help me!
Tìm x;y thuộc Z biết: 25-y2 =8(x-2015)2
Tim GTNN GTLN voi x thuoc Z A=\(\frac{2014-x}{x-2015}\)
Tim cac gia tri x, y thoa man:
a, ( x2 - 1 ) ( x2 - 16 ) < 0 ca x thuoc z
b, 1/x - y/8 = 1/16 va x, y thuoc N
c, | x+1 | + | x+2 | + | x+3 | = x
Tim x ,y thuoc Z : 2^x + 2^y = 72
tim x,y thuoc z thoa x^2+xy+y^2=x^2y^2
tim x,y thuoc z thoa 2(x^2+y^2)=1978
tim x y thuoc z biet (x+y).2=xy