(2x+1)^4=(2x+1)^6
(2x+1)^6-(2x+1)^4=0
(2x+1)^4.((2x+1)^2-1)=0
(2x+1)^4=0 Suy ra:x=-1/2
Hoac:(2x+1)^2-1=0
(2x+1)^2=1
2x+1=1
x=0
Vay x =-1/2;0
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Tìm x và y biết:d)-1frac{2}{3}-left(left|2xright|+frac{5}{6}right)-2e)left(-frac{1}{2}+frac{1}{3}right):left|1-2xright|-1frac{1}{4}:left(-frac{5}{8}right).left(-frac{1}{2}right)^2frac{1}{3}c)left|2x-1right|+left|2y+1right|+left|2x-yright|0b)left|2x-1right|2x-1a)left|x-3right|x+4
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Tìm x và y biết:
d)\(-1\frac{2}{3}-\left(\left|2x\right|+\frac{5}{6}\right)=\)\(-2\)e)\(\left(-\frac{1}{2}+\frac{1}{3}\right):\left|1-2x\right|-1\frac{1}{4}:\left(-\frac{5}{8}\right).\left(-\frac{1}{2}\right)^2=\frac{1}{3}\)
c)\(\left|2x-1\right|+\left|2y+1\right|+\left|2x-y\right|=0\)b)\(\left|2x-1\right|=2x-1\)
a)\(\left|x-3\right|=x+4\)
Bài 4 : Tìm x, biết :a ) left|4-2xright|+left|x+3right|8b ) left|x+1right|+left|x-2right|+left|x+3right|6c ) left|x-2right|+left|x-3right|+left|4-xright|2d ) 2left|x+2right|+left|4-3xright|11e ) left|2x-1right|+left|2x-5right|4g ) left|x-3right|+left|3x+4right|left|2x+1right|
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Bài 4 : Tìm \(x\), biết :
a ) \(\left|4-2x\right|+\left|x+3\right|=8\)
b ) \(\left|x+1\right|+\left|x-2\right|+\left|x+3\right|=6\)
c ) \(\left|x-2\right|+\left|x-3\right|+\left|4-x\right|=2\)
d ) \(2\left|x+2\right|+\left|4-3x\right|=11\)
e ) \(\left|2x-1\right|+\left|2x-5\right|=4\)
g ) \(\left|x-3\right|+\left|3x+4\right|=\left|2x+1\right|\)
Tìm x, biết:
a, 2x-10-[3x-14-(4-5x)-2x] = 2
b,\(\left(\frac{1}{4}x-1\right)+\left(\frac{5}{6}x-2\right)-\left(\frac{3}{8}x+1\right)=4,5\)
Baì 1 tìm x
a) \(\left(2x-3\right)^4+\left(2x-3\right)^6\)
b)\(\left(2x+1\right)^5=\left(2x+1\right)^6\)
c)\(3^3+3^{x+3}=756\)
Tìm x biết
\(\left(2x-1\right)^6=\left(2x-1\right)^8\)
Tìm x biết:
a) \(\left|x+2\dfrac{1}{2}\right|=\left|3x+1\right|\)
b) \(\left|2x-6\right|+\left|x+3\right|=8\)
c) \(2.\left|x+2\right|+\left|4-x\right|=11\)
Tìm x biết:
\(a.\left|2x-3\right|=x-2\\ b.\left(2x+3\right)^6-\left(2x+3\right)^4=0\)
Tìm x, biết:
\(\left(2x-5\right)^4+\left(3y+1\right)^6\le0\)
a) Tìm số tự nhiên n biết \(\left(n-1\right)^{n+11}-\left(n-1\right)^n=0\)
b) Tìm x biết: \(3\left(x-2\right)-4\left(2x+1\right)-5\left(2x+3\right)=50\)
c) Tìm x biết: \(\left|2x-3\right|=\left|2-x\right|\)