b: Để A là số nguyên thì \(\sqrt{x}+1⋮\sqrt{x}-3\)
\(\Leftrightarrow\sqrt{x}-3+4⋮\sqrt{x}-3\)
\(\Leftrightarrow\sqrt{x}-3\in\left\{1;-1;2;-2;4\right\}\)
hay \(x\in\left\{16;4;25;1;49\right\}\)
a) Tim so nguyen a de a2 + a + 3 / a+1 la so nguyen.o cho x-2xy+y=0
b)Tim so nguyen x,y sao cho x-2xy+y=0.
Tim x thuoc z de ps sau co gia tri la so nguyen
D = 2x - 3 / x - 1
TIm x thuoc Z de ps sau co gia tri la so nguyen :
C = \(\frac{3x+8}{x-1}\)
Giai chi tiet nha
tim cac so nguyen nuyen duong x,y,z biet rang :
x^3-y^3 -z^3 =3xyz va x^2 =2(y+z)
Bai 1 :cho A(x)=2x^2-8x
tim nghiem A(x)
b,tim B(x) biet B(x)=A(x)-3x+2x^2
c,tim ngiem B(x)
Bai2
Cho ham so y=f(x)=x+1
cac diem sau diem nao thuoc do thi ham so :A(0;1).B(1/2;-1). C(-1/2;0)
tim so huu ti x,y biet: (3x-30) mu 2016+/y-3/ be hon hoac bang 0
x-y=4 va x/y=3
Tim gia tri x , y thoa man
Tim (x;y) biet rang
\(\frac{5}{x}+\frac{y}{4}=\frac{1}{8}\)
1,Tìm nghiệm của các đa thức sau:
a, f(x)= \(x^{3}\)+2x-\(6x^{2}\)
b, N(x)= -2-x-x2
2, Cho f(x)=ax2+bx+c.
Xac dinh a; b; c biet f (x) co hai nghiem la 2 va -2; a la so lon hon c la 3 don vi
