Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
(4x-3)4=(4x-3)2
\(\Rightarrow\)(4x-3)4 - (4x-3)2=0
\(\Rightarrow\)(4x-3)2.[(4x-3)2-1]=0
\(\Rightarrow\)(4x-3)2-1=0:(4x-3)2
\(\Rightarrow\)(4x-3)2-1=0
\(\Rightarrow\)(4x-3)2=0+1
\(\Rightarrow\)(4x-3)2=1
\(\Rightarrow\)(4x-3)2=12
\(\Rightarrow\)4x-3=1
\(\Rightarrow\)4x=1+3
\(\Rightarrow\)x=4:4
\(\Rightarrow\)x=1
(x-1)3=125
\(\Rightarrow\)(x-1)3=53
\(\Rightarrow\)x-1=5
\(\Rightarrow\)x=5+1
\(\Rightarrow\)x=6
2x+2 - 2x=96
\(\Rightarrow\)2x. 4 - 2x=96
\(\Rightarrow\)2x . (4-1) = 96
\(\Rightarrow\)2x . 3 =96
\(\Rightarrow\)2x = 96:3
\(\Rightarrow\)2x = 32
\(\Rightarrow\)2x = 25
\(\Rightarrow\)x =5
A)
\(x^3=-125\)
\(x=-5\)
Vậy x = -5
B)
| x | = x + 1
\(\Leftrightarrow\orbr{\begin{cases}x=x+1\\x=-\left(x+1\right)\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x-x=1\\x=-x-1\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}0=1\left(VN\right)\\2x=-1\end{cases}}\)
\(\Leftrightarrow x=-\frac{1}{2}\)
Vậy x = -1/2
C) \(x^2=x\)
\(\Leftrightarrow x^2-x=0\)
\(\Leftrightarrow x\left(x-1\right)=0\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x-1=0\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}x=0\\x=1\end{cases}}\)
Vậy x1 = 0 ; x2 = 1
A) x3 = -125
x = -125 : 3
x \(\approx\)-41,5
B) | x | = x + 1
\(\orbr{\begin{cases}x=x\\x=-x\end{cases}}\)
=>\(\orbr{\begin{cases}x>0\\x< 0\end{cases}}\)
C) x2 = x
x \(\varepsilon\)N
~ Hok tốt ~
a, x:(1/2)3=-1/2
x:1/8= -1/2
x= -1/2.1/8
x=-1/16
b,(3/4)5.x=(3/4)7
x=(3/4)7:(3/4)5
x= (3/4)2
c,(2/5)^8:x=(2/5)^6
x=.......
như cái trên nha lm giống thế
a, => 3^x.(3^2-1)=24
=> 3^x.8=24
=> 3^x=24:8=3
=> 3^x=3^1
=> x=1
Tk mk nha
Bài 2
\(a,\left(x-3\right)^2=9\Leftrightarrow\left(x-3\right)^2=3^2\Leftrightarrow x-3=3\Leftrightarrow x=6\)
\(b,\left(\frac{1}{2}+x\right)^2=16\Leftrightarrow\left(\frac{1}{2}+x\right)^2=4^2\Leftrightarrow\frac{1}{2}+x=4\Leftrightarrow x=\frac{7}{2}\)
\(\left(a\right):\left(x-1,2\right)^2=4=\left(\pm2\right)^2\\ =>\left[{}\begin{matrix}x-1,2=2\\x-1,2=-2\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=3,2\\x=-0,8\end{matrix}\right.\)
\(\left(b\right):\left(x+1\right)^3=-125=\left(-5\right)^3\\ =>x+1=-5\\ =>x=-6\)
chịu :)