TIM X THUOC Z
/3X-4/=/X+2/
LT
Những câu hỏi liên quan
tim x thuoc z
a) 4 ( x - 1 ) ( 3x + 2 ) = 16
Tim X thuoc Z de
\(\frac{3x^2-6x+1}{x-2}\)thuoc Z
\(\frac{3x^2-6x+1}{x-2}=\frac{3x\left(x-2\right)+1}{x-2}=3x+\frac{1}{x-2}\)
Vì \(x\inℤ\)\(\Rightarrow3x\inℤ\)
\(\Rightarrow\)Để \(\frac{3x^2-6x+1}{x-2}\inℤ\)thì \(\frac{1}{x-2}\inℤ\)
\(\Rightarrow1⋮x-2\)\(\Rightarrow x-2\inƯ\left(1\right)=\left\{-1;1\right\}\)
\(\Rightarrow x\in\left\{1;3\right\}\)
Vậy \(x\in\left\{1;3\right\}\)
tim x va y thuoc z
a,3x - xy + 6y = 4
b,x^2 - 3xy + 2x - 6y = 7
3x -xy + 6y- 18 = 4 -18
x(3-y) + 6(y -3) = -14 => x(y-3) -6(y-3) =14
(y-3)(x-6) =14
| y-3 | 1 | -1 | 14 | -14 | 2 | -2 | 7 | -7 |
| x-6 | 14 | -14 | 1 | -1 | 7 | -7 | 2 | -2 |
| y | 4 | 2 | 17 | -11 | 5 | 1 | 10 | -4 |
| x | 20 | -8 | 7 | 5 | 13 | -1 | 8 | 4 |
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tim x , y thuoc Z biet
a , 3x-xy+6y=4
b,x^2-3xy=2x-6y=7
Tim x thuoc z, biet :(3x+7) chia het cho (x+2)
cho A = 1/15 nhan 225/(8+2) + 3/14 nhan 196/(3x+6) (x thuoc Z; x khac -2 )
a) Rut gon A
b) Tim x thuoc Z de A thuoc Z
c) trong cac gia tri nguyen A tim gia tri lon nhat va gia tri nho nhat
tim x thuoc z , biet : 2x-3/3 + -3x +4/4+5x-12/5 = 241/60
tim x thuoc Z biet 6-3x chia het cho x+3 x2-4 chia het cho x+1
Xem thêm câu trả lời
3) Tim n thuoc Z sao cho :
a)3n+1chia het cho (n-2)
b)4n-3 chia het cho (2n+3)
4)tim x,y thuoc Z sao cho :
a)xy-3x-y-6=7
b)2xy+10y + x =5
ai nhanh minh tick cho