Question

x¹⁵=x

Tìm x

Mik cần gấp

Answer 1

\(x^{15}=x\\\Rightarrow x^{15}-x=0\\\Rightarrow x(x^{14}-1)=0\)

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

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

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

Vậy: \(x\in\left\{0;1;-1\right\}\)

Answer 2

x¹⁵ = x

x¹⁵ - x = 0

x.(x¹⁴ - 1) = 0

x = 0 hoặc x¹⁴ - 1 = 0

*) x¹⁴ - 1 = 0

x¹⁴ = 1

x = 1 hoặc x = -1

Vậy x = 0; x = -1; x = 1

Answer 3

x=1 ạ

Answer 4

x là 1 hay 0