Các câu hỏi tương tự
Tim x biet : \(\left(8x-1\right)^{2n+1}=5^{2n+1}\)
tim x thuoc Z biet : 2x+\(\frac{1}{7}=\frac{1}{y}\)
1) Tim a, b thuoc Q biet: a-b=2(a+b)=a:b
2) Tim x thuoc Q sao cho: (x-1)(x+3)<0
tim x biet : \(\left(3^x\right)^2:3^2=\frac{1}{243}\)
Tim x,y thuoc Z biet: \(2x+\frac{1}{7}=\frac{1}{y}\)
Tim X thuoc Z de
\(\frac{3x^2-6x+1}{x-2}\)thuoc Z
tim x biet
a;\(\frac{3x+2}{5x+7}=\frac{3x-1}{5x+1}\)
b; \(\frac{x+1}{2x+1}=\frac{0,5x+2}{x+3}\)
(5x+1)2=36/49
(3x-2)5=-243
5x=125
(3x2-51)2n=(-24)2n (n thuoc N*)
tim x biet : \(\left(3^x\right)^2:3^2=\frac{1}{243}\)