Cho hàm số 2 biến f(x;y) = \(x^3\) + 17x + 36y
Tồn tại hay không sô nguyên x ; y thoả mãn f(x;y) = \(2018^{2018}\)
tim cac cap so nguyen ( x ; y ) thoa man : xy - x - y = 2
Cho 3 so x, y, z thoa man xyz = 2018. CMR :
\(\dfrac{2018x}{xy+2018+2018z}+\dfrac{y}{yz+y+2018}+\dfrac{z}{xz+z+1}=1\)
cho ham so y=f(x)=(m-1) ( m khac 1 )
a, xac dinh gia tri cua m de do thi ham so di qua diem A(1;-3).ve do thi ham so vua tim duoc
b,voi ham so tim duoc o cau a,tinh f(2/3), f(-4)
c,diem M(-1;3) va N(6;-9) co thuoc do thi ham so tim duoc o cau a khong?
cho x, y la cac so nguyen duong sao cho A = x^4 + y^4 / 15 cung la so nguyen duong . cmr : x va y deu chia het cho 3 va 5 , tu do tim gtnn cua A
Tim cac cap so nguyen x;y sao cho x^2+y^2=5
Cho ham so y=f(x) =12/x
c) tim x de y <0
d) tim x thuoc Z de y nhan GTLN
co bao nhieu so nguyen x thoa man I2x-2I+I2x-6I<4
cap so tu nhien a, b thoa man (2018a+3b+1)x(2018a +2018a+b)=225