Ta có : (2-x)(5-x)<0 => Ta có hai TH
TH1 : 2-x < 0 => x>2
và 5-x >0 => x<5
=> 2<x<5
TH2 : 2-x > 0 => x<2
và x<5 ( TH này loại )
Vậy tập nghiệm x là 2<x<5
tim so nguyen x, biet (x^2-5).(x^2-25)<0
Tim so nguyen x biet
(x - 2)(x2 + 1) > 0
(x + 5)(2 - x) < 0
Tim so nguyen x biet
(x - 2)(x2 + 1) > 0
(x + 5)(2 - x) < 0
bai 1 tim so nguyen duong nho nhat co 3 chu so , so nguyen a lon nhat co 2 chu so
bai 2: tim x thuoc Z biet
a, / x/ = -5
b, /x/= <7
c, /x/ = 4
d, /x/=0
tim cac so nguyen x biet
a) (2x - 10 )(x + 3)=0
b)(x+ 5)(x2 - 9)=0
Tim so nguyen x,y biet:
a. (x+2).(x+5)>0
b.(x-1).(y-2)=12
tim so nguyen x
biet rang x+5 la so nguyen am nho nhat co 2 chu so
bai 2 tim so nguyen x biet rang x-7 la so nguyen am lon nhat co 2 chu so
nhanh len minh dang gap minh like nhanh len
1,tim cac so nguyen x,y biet: -2/x=y/3 va x<0<y
2, Tim cac so nguyen x,y biet:x-3/y-2=3/2 va x-y=4
Tim so nguyen x biet
5x + 2 - 5x - 1 = 3100
(x - 4)(2x + 3) < 0