cho 2 so x;y la cac so nguyen sao cho :/x/ +/y/ = 2 so cap (x;y) thoa man la

so nguyen x thoa man ( x + 2 )( x + 4 ) < 0 la

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).

So cac gia tri nguyen cua x thoa man |x.(x^2 - 3)| = x la

tim so nguyen x thoa man -210=-1+-2+-3+...+(-x-1)+-x la

cho x la so nguyen thoa man : -7/25<x/30<-1/5. so gia tri cua x thoa man la

Tim 3 so nguyen to lien tiep x,y,z (x<y<z) thoa man A = x^2 + y^2 + z^2 la so nguyen to

tap hop cac so nguyen x thoa man 15-/x-2\=12 la

1/so cac so chan co cac chu so khac nhau lap tu cac chu so 1;2;3;4

2/so cac so nguyen thoa man /-12x+7/=40  la

3/tap hop cac so nguyen x thoa man /7-x/=/x+3/ la

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