Đại số lớp 7
Các câu hỏi tương tự
Tìm x,y biết
\(\left(x-3\right)^2+\left(y+2\right)^2=0\)
\(2\times x+2^{x+3}=136\)
\(\left(x-12+y\right)^{200}+\left(x-4-y\right)^{200}=0\)
\(\left(2\times x-5\right)^{2000}+\left(3\times y+4\right)^{2002}\le0\)
tim x , biet :
a) x + dfrac{3}{10} dfrac{-2}{5}
b) x + dfrac{5}{6} dfrac{2}{5} - left(-dfrac{2}{3}right)
c) 1dfrac{2}{5} x + dfrac{3}{7} -dfrac{4}{5}
d) left[x+dfrac{3}{4}right]-dfrac{1}{3}0
e) left[x+dfrac{4}{15}right]-left[-3,75right]-left[-2,15right]
f) left(x-2right)^21
g) left(2x-1right)^3-27
h) dfrac{x-1}{-15}dfrac{-60}{x-1}
i) x : left(dfrac{-1}{2}right)^3dfrac{-1}{2}
j) left(dfrac{3}{4}right)^5.xleft(dfrac{3}{4}right)^7
k) 8^x:2^x4
Đọc tiếp
tim x , biet :
a) x + \(\dfrac{3}{10}\)= \(\dfrac{-2}{5}\)
b) x + \(\dfrac{5}{6}\) = \(\dfrac{2}{5}\) - \(\left(-\dfrac{2}{3}\right)\)
c) \(1\dfrac{2}{5}\) x + \(\dfrac{3}{7}\) = \(-\dfrac{4}{5}\)
d) \(\left[x+\dfrac{3}{4}\right]-\dfrac{1}{3}=0\)
e) \(\left[x+\dfrac{4}{15}\right]-\left[-3,75\right]=-\left[-2,15\right]\)
f) \(\left(x-2\right)^2=1\)
g) \(\left(2x-1\right)^3=-27\)
h) \(\dfrac{x-1}{-15}=\dfrac{-60}{x-1}\)
i) x : \(\left(\dfrac{-1}{2}\right)^3=\dfrac{-1}{2}\)
j) \(\left(\dfrac{3}{4}\right)^5.x=\left(\dfrac{3}{4}\right)^7\)
k) \(8^x:2^x=4\)
Tim x biet :
\(a,\frac{x-1}{2009}+\frac{x-2}{2008}=\frac{x-3}{2007}+\frac{x-4}{2006}\)
\(b,\left|x-1\right|+\left|x-2\right|+\left|x-3\right|=4\left(x-4\right)\)
Tìm x biết :
\(\dfrac{3}{\left(x+2\right)\cdot\left(x+5\right)}+\dfrac{5}{\left(x+5\right)\cdot\left(x+10\right)}+\dfrac{7}{\left(x+10\right)\cdot\left(x+17\right)}=\dfrac{x}{\left(x+2\right)\cdot\left(x+17\right)}\) Vs x \(\notin\){-2;-5;-17;-10}
Bài 1 : Tìm x biết :
a) \(3\left|x-1\right|+3\left|3x-5\right|=2\) b)\(\left|x+2\right|+\left|2x-1\right|+\left|5x-15\right|=10\)
Bài 2 :
a)\(\left|6x-9\right|+\left|9x-33\right|=13\) b)\(\left|x+1\right|+\left|3x-2\right|+\left|6x-24\right|=15\)
1.Tìm x biết
Xem chi tiết
\(\left|x+\frac{1}{2}\right|+\left|x+\frac{1}{6}\right|+\left|x+\frac{1}{12}\right|+\left|x=\frac{1}{20}\right|+...+\left|x+\frac{1}{101}\right|=101x\)
2. Tìm x, y, z biết\(\left(2x+1\right)^{2008}+\left(y-\frac{2}{5}\right)^{2008}+\left|x+y+z\right|=0\)
3.Tìm x\(a,2009-\left|x-2009\right|=x\)
\(b,\left|3x+2\right|=\left|5x-3\right|\)
tim x biet \(\left|x-5\right|< =2\)
\(\dfrac{2}{\left(x-2\right)\left(x-3\right)}+\dfrac{5}{\left(x-3\right)\left(x-8\right)}\)+\(^{\dfrac{12}{\left(x-8\right)\left(x-20\right)}}\)-\(\dfrac{1}{x-20}\)= \(\dfrac{-3}{4}\)
Tìm GTNN của biểu thức:
a) \(\left|x-23\right|+\left|x-10\right|\)
b) \(\left|x-2\right|+\left|x-5\right|+\left|x+3\right|\)
c) \(\left|x-2\right|+\left|x-3\right|+\left|x-4\right|+\left|x-5\right|\)