\(x^2-3<0\Rightarrow x^2<3\)
Mà \(x^2\ge0\) với mọi x
=>\(x^2\in\left\{0;1;2\right\}\)
=>\(x\in\left\{0;-1;1;\sqrt{2};-\sqrt{2}\right\}\)
Mà \(x\in Z\Rightarrow x\in\left\{-1;0;1\right\}\)
tap hop cac so nguyen x thoa man \(x^2\)-4x=0 la.............
c1: Tap hop cac gia tri nguyen cua x thoa man \(\left(x+\frac{5}{4}\right)\left(x-\frac{19}{7}\right)\)<0
c2: Neu x,y la cac so nguyen thoa man 2xy+4y=6 thi y co the nhan nhung gia tri nam trong tap hop nao
c3: tim 3 so x,y,z biet x+y=8,x+z=10,y+z=12
C4: Gia tri cua x thoa man (x+3)^2=25 va x^3>0 la x=
tap hop cac gia tri nguyen cua x thoa man (x^2+4x+13) chia het cho x+4 co so phan tu la
tap hop cac so huu ti x thoa man x-5= x+3 la
tap hop cac gia tri nguyen x thoa man |3x-4|=|x+2|
Tap hop cac gia tri nguyen cua x thoa man 3x-4=x+2
tap hop cac gia tri nguyen cua x thoa man (x2+4x+13)chia het cho (x+4) co so phan tu...?
Bai 1
( 1/2 - 1 ) . (1/3- 1) . ( 1/4 - 1 )....( 1/2012 - 1 ) . ( 1/2013 - 1)
Bai 2 Tim tap hop cac so nguyen x thoa man cac dieu kien sau
a) 7/2 . 5/12 - 1 < x < 23/3 ÷ 7/3 + 5/7
b) -2240/6 x + 3 ÷ 5/3 la so nguyen
tap hop cac gia tri nguyen cua x thoa man |3x -4|=|x+2|
