Tìm X để căn thức sau có nghĩa
a) \(\sqrt{1-2x}\) c) \(\sqrt{\frac{4}{5x-3}}\) e)\(\sqrt{1-x^3}\)
b) \(\sqrt{\frac{2}{1-x^2}}\) d) \(\sqrt{\frac{1}{\sqrt[3]{9-x^2}}}\) g) \(\sqrt{4x^2-9}\)
h) \(\sqrt{\frac{5-2x}{x^2+4}}\) i) \(\sqrt[3]{\frac{1-x}{1+x}}\) j) \(\frac{1}{x+\sqrt{x-4}}\)
k) \(\sqrt{\frac{3+x^2}{4-x^2}}\) l) \(\sqrt{\frac{x^2}{1+x}}\)
