Question

( x + 1 ) mu 4 = ( 2. x) mu 4

Answer 1

\(( x + 1 )^4 = ( 2x)^4\)

\(\Leftrightarrow x + 1 = 2x\) hoặc \(x+1=-2x\)

\(\Leftrightarrow x =1\) hoặc \(x=\frac{-1}{3}\)

KL: Vậy  \(x =1\) hoặc \(x=\frac{-1}{3}\)