Question

x¹⁵ = x

mn giúp mk nha !!!

Answer 1

\(x^{15}=x\\ x^{15}-x=0\\ x\left(x^{14}-1\right)=0\\ \Rightarrow\left[{}\begin{matrix}x=0\\x^{14}=1\Rightarrow\left[{}\begin{matrix}x=1\\x=-1\end{matrix}\right.\end{matrix}\right.\)

vậy ......

Answer 2

\(x^{15}=x\)

\(\Rightarrow x^{15}-x=0\)

\(x\left(x^{14}-1\right)=0\)

\(x=0\)

\(x^{14}-1=0\Rightarrow x^{14}=1\Rightarrow x=\pm1\)