a) \(\left|x-\frac{3}{2}\right|< \frac{5}{3}\Rightarrow-\frac{5}{3}< x-\frac{3}{2}< \frac{5}{3}\Rightarrow-\frac{1}{6}< x< \frac{19}{6}\)
b) \(\left|x+\frac{11}{2}\right|>5\) \(\Rightarrow\left[\begin{array}{nghiempt}x+\frac{11}{2}>5\\x+\frac{11}{2}< -5\end{array}\right.\) \(\Rightarrow\left[\begin{array}{nghiempt}x>-\frac{1}{2}\\x< -\frac{21}{2}\end{array}\right.\)
Tìm x \(\in\) Q:
a) \(\frac{11}{12}-\left(\frac{2}{5}+x\right)=\frac{2}{3}\)b) \(2x\left(x-\frac{1}{7}\right)=0\)c) \(\frac{3}{4}+\frac{1}{8}.x=\frac{2}{5}\)tìm x ϵ Q , biết rằng:
a) \(\frac{11}{12}-\left(\frac{2}{5}+x\right)=\frac{2}{3}\) B) \(\frac{3}{4}+\frac{1}{4}:x=\frac{2}{3}\)
Tìm x biết :
a) \(-\frac{2}{3}.x+4=-12\)
b) \(-\frac{3}{4}+\frac{1}{4}:x=-3\)
c) \(\frac{x+1}{2}+\frac{x+2}{3}+\frac{x+1}{4}=\frac{x+1}{5}+\frac{x+1}{6}\)
d)\(\frac{x+1}{2009}+\frac{x+2}{2008}+\frac{x+3}{2007}=\frac{x+10}{2000}+\frac{x+11}{1999}+\frac{x+12}{1998}\)
Tìm x,y,z:
a)\(\frac{x}{3}=\frac{y}{4};\frac{x}{5}=\frac{z}{6}\)và x+y-z=3
b)(x-1):\(2\frac{1}{3}\)=\(6\frac{9}{11}\):(x-1)
tìm x:
a,\(\left(x-\frac{7}{9}\right)^3=\left(\frac{2}{3}\right)^6\)
b,\(\left(\frac{x}{2}-5\right)^5=-32\)
c,\(\left(x-7\right)^{x+1}-\left(x-7\right)^{x+11}=0\)
Tìm x :\(\left(x-3^2\right)^3=\left(3^3\right)^2\)
b) \(\frac{3x}{2}=\frac{4y}{5}\) và y-x=21
c)\(\frac{x-3}{x+5}=\frac{5}{7}\)
d)\(\frac{x-1}{x+2}=\frac{x-2}{x+3}\)
Giúp mk vs đg cần gấp nha cảm ơn mấy bạn nhiều lắm !!!
\(\left(\frac{1}{2}\right)^5.x=\left(\frac{1}{2}\right)^7\)
\(\left(\frac{3}{7}\right)^2.x=\left(\frac{9}{21}\right)^2\)
Bài tìm x biết :
2x=2
3x=34
7x=77
(-3)x=(-3)5
(-5)x=(-5)4
2x=4
2x=8
2x=16
3x+1=32
5x-1=5
6x+4=610
52x-7=511
(-2)4x+2=64
\(\left(\frac{1}{2}\right)^x=\left(\frac{1}{2}\right)^5\)
\(\left(\frac{5}{6}\right)^{2x}=\left(\frac{5}{6}\right)^5\)
\(\left(\frac{3}{4}\right)^{2x-1}=\left(\frac{3}{4}\right)^{5x-4}\)
\(\left(-\frac{1}{10}\right)^x=\frac{1}{100}\)
\(\left(-\frac{3}{2}\right)^x=\frac{9}{4}\)
\(\left(-\frac{3}{5}\right)^{2x}=\frac{9}{25}\)
\(\left(-\frac{2}{3}\right)^x=-\frac{8}{27}\)
Tìm x biết:
a) \(x-\frac{5}{4}=\frac{1}{3}-\frac{3}{4}x\)
b) \(\frac{1}{2}x+\frac{1}{5}=\frac{2}{3}x-\frac{1}{4}\)
Tìm 1 nghiệm của đa thức sau :
a) \(P\left(x\right)=7x^2-5x-2\)
b) \(Q\left(x\right)=\frac{1}{3}x^2+\frac{2}{5}x-\frac{11}{15}\)
