5x-2√x(2+y)+y^2+1=0
Tim cap so x,y thoa man dieu kien tren
Giup di lam on.....
a)Tim cap (x,y) nguyen duong thoa man xy=3(y-x)
b)cho 2 so x,y >0 thoa man x+y = 1
Tim GTNN cua M=(x^2+1/y^2)(y^2+1/x^2)
Tim tat ca cac cap so nguyen(x,y) thoa man:
10x + y = x2 + y2 +1
goi k la so cac cap số thực (x;y) khac 0 thoa man: (x^2+1)(x^2+y^2)-4x^2*y=0.vay k la
So cap (x0;y0) nguyen thoa man phuong trinh 2x6+y2-2x3y=320
tim cac cap so nguyen thoa man phuong trinh sau:
a)2x+y=0
b)6x-15y=4
tim cac cap so nguyen thoa man cua phuong trinh sau:
a)2x+y=0
b)6x-15y=4
a)Tim tat ca cac so nguyen duong x, y , z thoa man: \(\frac{x+y\sqrt{2013}}{y+z\sqrt{2013}}\)la so huu ti, dong thoi x2 + y2+ z2 la so nguyen to.
b) Tim so tu nhien x, y thoa man: x(1+x+x2) = y(y-1).
