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a) 2x+1 : 4 = 16
2x+1 = 16 . 4 = 64 = 26
=> x + 1 = 6
x = 6 - 1 = 5
b) (x - 2)3 = 27 = 33
=> x - 2 = 3
x = 3 + 2 = 5
c) 1010 + x = 100
1 + x =100
x = 100 - 1 = 99
d) (18 - 23) + 2x = 22 . 15 = 4 . 15 = 60
(18 - 8) + 2x = 60
10 + 2x = 60
2x = 60 - 10 = 50
x = 50 : 2 = 25
tick nha
6x . 6 = 2016
6x = 2016 : 6
6x = 336
=> x \(\in\varnothing\)
42x+3 : 4 = 256
42x+3 = 256 x 4
42x+3 = 1024
42x+3 = 45
2x + 3 = 5
2x = 5 - 3
2x = 2
x = 2 : 2
x = 1
[ x - 2 ]2 = 16
[ x - 2 ]2 = 42
x - 2 = 4
x = 4 + 2
x = 6
[ 2x - 1 ]3 = 27
[ 2x - 1 ]3 = 33
2x - 1 = 3
2x = 3 + 1
2x = 4
x = 4 : 2
x = 2
[ 2x - 1 ]100 = [ 2x - 1 ]100
=> x \(\in N\)
a) \(\left(x+5\right)^2=100\Leftrightarrow\orbr{\begin{cases}\left(x+5\right)^2=10^2\\\left(x+5\right)^2=\left(-10\right)^2\end{cases}\Leftrightarrow\orbr{\begin{cases}x+5=10\\x+5=-10\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=5\\x=-15\end{cases}}}\)
b) \(\left(2x-4\right)^2=0\Leftrightarrow2x-4=0\Leftrightarrow2x=4\Leftrightarrow x=2\)
c) \(\left(x-1\right)^3=27\Leftrightarrow\left(x-1\right)^3=3^3\Leftrightarrow x-1=3\Leftrightarrow x=4\)
a) \(\left(x+5\right)^2=100\)
=> \(\orbr{\begin{cases}\left(x+5\right)^2=10^2\\\left(x+5\right)^2=\left(-10\right)^2\end{cases}}\)
=> \(\orbr{\begin{cases}x+5=10\\x+5=-10\end{cases}}\)
=> \(\orbr{\begin{cases}x=5\\x=-15\end{cases}}\)
b) \(\left(2x-4\right)^2=0\)
=> \(2x-4=0\)
=> \(2x=4\)
=> \(x=2\)
c) \(\left(x-1\right)^3=27\)
=> \(\left(x-1\right)^3=3^3\)
=> \(x-1=3\)
=> \(x=4\)
1) 2x+1+2x=2x(2+1)=24
=>2x=8 =>x=3
2) 4x+1-3.4x=4x(4-3)=>4x=16=>x=2
3) x2-x=x(x-1)=0
=>\(\orbr{\begin{cases}x=0\\x-1=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x=1\end{cases}}}\)
\(\orbr{\frac{\begin{cases}x^4-16=0=>x^4=2^4=>x=+-2\\3^{2x-1}-27=0=>2x-1=3=>x=2\end{cases}}{ }}\)
DS x={-2,2}