\(x-2\)là bội của \(x+5\)hay \(x-2⋮x+5\)
\(\Rightarrow\left(x+5\right)-7⋮x+5\)
Vì \(x+5⋮x+5\)\(\Rightarrow\)Để \(x-2⋮x+5\)thì \(7⋮x+5\)
\(\Rightarrow x+5\inƯ\left(7\right)=\left\{-7;-1;1;7\right\}\)\(\Rightarrow x\in\left\{-12;-6;-4;2\right\}\)
Vậy \(x\in\left\{-12;-6;-4;2\right\}\)
Suy ra : x-2 chia hết x+5
Suy ra : x+5-7 chia hết x+5
Mà x+5 chia hết cho x+5
Suy ra x+5 thuộc Ư (-7)={1;-1;7;-7}
Suy ra x thuộc {-4;-6;2;-12}
tim x dua vao quan he uoc boi:
tim so tu nhien x sao cho x-1 la uoc cua 12
tim so tu nhien x sao cho 2x+1 la uoc cua 28
tim so tu nhien x sao cho x+15 la boi cua x+3
tim cac so nguyen x,y sao cho (x+1)(y-2)=3
tim so nguyen x sao cho(x+2).(y-1)=2
tim so nguyen to x vua la uoc cua 275 vua la uoc cua 180
tim so nguyen to x,y biet x+y=12 va UCLL (x:y)=5
tim so tu nhien x,y biet x+y=32 va UCLL (x:y)=8
tim so tu nhien x biet x chia het cho10; xchia het cho12; x chia het cho15 va 100<x<150
tim so x nho nhat khac 0b biet x chia het cho 24 va 30
40 chia het cho x . 56 chia het cho x va x>6
Tim so nguyen x biet 4x+1 la boi cua x -1
tim so nguyen x
(a+3) la uoc cua 7
12 la boi cua (a+1)
( x-5) chia het cho ( x+1)
( x+2) la uoc (3×x-7)
a) tim gia tri nho nhat cua bieu thuc : A = | 1-x | + 8
b) tim cac so nguyen x biet 13 la boi cua x - 4
c) tim so nguyen x sao cho ( x + 5 ) chia het cho ( x + 3 )
giup minh voi! minh can gap gap gap.....
Tim x biet:
+)2x + 3 la boi cua x - 2
+)11x la so nguyen to
NHANH LEN!
tim cac so nguyen x sao cho
a/ x-11la boi cua x-2
b/x+1 la uoc cua 3x+14
1.Tim cac so nguyen x,sao cho:
A.11 la boi cua 2.x-1
B.x-13 la boi cua 2x-1
C.2x-1la uoc cua 21
D. X+1 ls uoc cua 4x+11
1) Tim dang tong quat cua so nguyen x trong moi truong hop sau day :
a) x la boi cua 13
b)x la boi chung lon hon -245 cua 12,16 va -20
c)x la boi cua -11 va chia cho 6 du 5
ai làm nhanh và đúng nhất tớ sẽ tích cho
tim so nguyen x biet n -1 la boi cua 2n+3