Tìm x thuộc số nguyên để:
a)\(\frac{1-x}{x+4}\inℤ\)
b) \(\frac{11-2x}{x-5}\inℤ\)
c) \(\frac{x+1}{2x+1}\inℤ\)
giúp mik với,tks
5, Tìm x, y ϵ Z, sao cho:
a) y = \(\dfrac{6x-4}{2x+3}\) b) \(\dfrac{1}{x}-\dfrac{y}{2}=\dfrac{1}{4}\)
c) xy-3x+2y=5 d) (3x-5)(2x+1)=12
Tìm số nguyên x, biết
a) \(-\dfrac{x}{2}+\dfrac{2x}{3}+\dfrac{x+1}{4}+\dfrac{2x+1}{6}=\dfrac{8}{3}\)
b) \(\dfrac{3}{2x+1}+\dfrac{10}{4x+2}-\dfrac{6}{6x+3}=\dfrac{12}{26}\)
tìm các số nguyên x (x \(\inℤ\)) để:
a)M=\(\frac{x+3}{2}\)\(\inℤ\)
b)N=\(\frac{7}{x-1}\inℤ\)
c)P=\(\frac{x-1}{x+1}\inℤ\)
Giúp mik nhé.Thanks các bạn.
Tìm x:
\(a\)) \(\dfrac{2}{3}+\left(x-\dfrac{1}{2}\right)^3=\dfrac{19}{27}\)
\(b\)) \(\left(\dfrac{3}{2}\right)^{2x-1}:\left(\dfrac{27}{8}\right)^3=\dfrac{81}{16}\)
\(c\)) \(\dfrac{1}{2}.2^x+4.2^x=9.2^5\)
\(d\)) \(\text{12 - (2x +1)}^2=-69\)
\(|2x+3|+|2x-1|=\frac{8}{2\left(y-5\right)^2+2}\)
Tìm x, y \(\inℤ\)
Cho \(P\left(x\right)=x^3-a^2x+2016b\left(a,b\inℤ\right)\) và a không chia hết cho 3
Chứng minh \(p\left(x\right)⋮3,\forall x\inℤ\)
Tìm \(x\inℤ\)để\(A\inℤ\)
A=\(\frac{x+1}{x-2}\)( \(x\ne2\))
B=\(\frac{x-1}{x-2}\)(\(x\ne2\))
C=\(\frac{x+1}{x+2}\)(\(x\ne-2\))
D=\(\frac{2x-1}{x+1}\)(\(x\ne-1\))
Tìm \(x\inℤ\)để \(A\inℤ\)và tìm giá trị đó
a) \(A=\frac{x+3}{x-2}\) b, \(A=\frac{1-2x}{x+3}\)