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tim x,y la so nguyen thoa man 1/x+1/y=1/8 dang can gap
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tim so nguyen x , y thoa man : x - 2.x.y + 3.y = 1
tim so nguyen x thoa man -210=-1+-2+-3+...+(-x-1)+-x la
so cap so nguyen x,y thoa man 5/x-y/3=1/6 la
1.Tim cac chu so x va y de so 1x8y2 chia het cho 36
2.tim cac gia tri nguyen cua n de phan so A=3.n+2/n-1 co gia tri la so nguyen
3.tim cac chu so x y thoa man
(x-2)^2.(x-3)^2=4
4.tim so tu nhien x biet
(x-5):3/100=20.x/100 +5
a, co bao nhieu cap so nguyen ( x,y ) thoa man x + y=1
b. co bao nhieu cap so nguyen ( x,y ) thoa man x.2 + y =1
so cap ( x , y ) nguyen thoa man (y +1 ) (2x +3 ) = 7 la.....
Cho x;y la so nguyen sao cho | x | + | y | = 5. So cap so nguyen ( x;y ) thoa man la
so cap x;y nguyen thoa man [x+1][x+2]=7 la bao nhieu