a,\(\sqrt{\frac{3x}{2}}\) b,\(\sqrt{\frac{-2}{3}}\) c,\(\sqrt{3x-2}\) d,\(\sqrt{2-3x}\) e,\(\sqrt{\frac{1}{2x+1}}\) j,\(\sqrt{2x^2}\)
g,\(\sqrt{x^2-4}\) h,\(\sqrt{4-x^2}\) i,\(\sqrt{\frac{1}{x^2-4x+4x}}\) k,\(\sqrt{4x^2+4x-1}\) l,\(\sqrt{\frac{x-3}{2-x}}\)
Tìm x để phân thức có nghĩa