Tim x,y nguyen thoa man:
X^4 + y + 4 = y^2 - x^2
tim cap so nguyen x,y thoa man: |x+4|+|y-2|=3
tim x,y nguyen thoa man : \(x^4+y+4=y^2-x^2\)
tim cac so nguyen to x,y thoa man:(x -2) nhan (y-3)=-4
tim cac so nguyen to x, y thoa man: (x - 2)2(y - 3)= -4
tim cac so nguyen duong x,y,z thoa man x^2+y^3+z^4
tim so nguyen to x , y thoa man : ( x - 2 )2 * ( y - 3 )2 = 4
tim so cap gia tri x , y nguyen thoa man |x|+|y|=4
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)
mình biết làm nhưng dài quá bạn tra trên google là đc
tim x, y nguyen duong thoa man xy+ x- y = 4
Ta có:
xy+x-y=4
<=> xy+x-y-1=3
<=> x(y+1)-(y+1)=3
<=>(y+1)(x-1)=3=1.3=3.1 (Do x, y nguyên dương)
=> \(\hept{\begin{cases}y+1=1\\x-1=3\end{cases}}\)=> \(\hept{\begin{cases}y=0\\x=4\end{cases}}\)
Và: \(\hept{\begin{cases}y+1=3\\x-1=1\end{cases}}\) => \(\hept{\begin{cases}y=2\\x=2\end{cases}}\)