Question

rút gọn

\(\dfrac{\left|x-4\right|}{x-4}\)

Answer 1

\(\dfrac{\left|x-4\right|}{x-4}\)

+ ) \(\left|x-4\right|\Leftrightarrow\left[{}\begin{matrix}x-4\\4-x\end{matrix}\right.\)

TH1 : \(\dfrac{x-4}{x-4}=1\)

TH2 : \(\dfrac{4-x}{x-4}\)

Answer 2

Ta có:\(\left|x-4\right|\Leftrightarrow\left[{}\begin{matrix}x-4\\4-x\end{matrix}\right.\)

\(\Rightarrow\)TH1:\(\dfrac{\left|x-4\right|}{x-4}=\dfrac{x-4}{x-4}=1\)

TH2;\(\dfrac{\left|x-4\right|}{x-4}=\dfrac{4-x}{x-4}=-1\)

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