/ 2-x/ = x -2
=> / x -2/ =x -2
=> x -2 >/ 0
=> x >/ 2
Đúng 0
Bình luận (0)
/ 2-x/ = x -2
=> / x -2/ =x -2
=> x -2 >/ 0
=> x >/ 2
Bai 1;
Tim moi so nguyen to thoa man; x^2-2y^2=1
Tim x thoa man |x2+|x-1||=x2
tim x thoa man -x^2+6x=0
Cho 5/(√x-2) ∈ Z. Tim x∈N thoa man.
tim x va y thoa man: x^2 - xy -2y^2 - 1 = 0
tim cap so nguyen (x;y) thoa man : |x+2| + (y+2)2 = 3 - |x+1|
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
/ x / + 2 / y / < 2.99 tim x y thoa man
cho x,y thoa man: x^2+y^2= x+y .tim MIN ,MAX cua B=x-y