Question

Answer 1

Lời giải:

a. ĐKXĐ: $x\in\mathbb{R}$

b. ĐKXĐ: $4x-2\neq 0\Leftrightarrow x\neq \frac{1}{2}$

c. ĐKXĐ: \(\left\{\begin{matrix} x+1\geq 0\\ 5x-4\neq 0\end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} x\geq -1\\ x\neq \frac{4}{5}\end{matrix}\right.\)

d. ĐKXĐ: \(\left\{\begin{matrix} x-3\neq 0\\ x-1\geq 0\end{matrix}\right.\Leftrightarrow \left\{\begin{matrix} x\neq 3\\ x\geq 1\end{matrix}\right.\)