Question

x.(x²)³=x⁵

Answer 1

\(\Rightarrow x^7=x^5\)

\(\Rightarrow x^7-x^5=0\)

\(\Rightarrow x^5\left(x^2-1\right)=0\)

\(\Rightarrow x^5\left(x-1\right)\left(x+1\right)=0\)

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

Vậy ....

Answer 2

<=>x. x⁶ = x⁵

<=>x⁷ = x⁵

<=>x⁵. [x²-1] = 0

<=>x⁵. [x²-1].[x + 1] = 0

<=> x = 0

= 1

= -1