Tìm điều kiện của x để giá trị của các phân thức xác định
a) $\frac{\mathrm{5} }{\mathrm{2} x- 3x^{2}}$
b) $\frac{\mathrm{-5} x^{2}}{\mathrm{16} -24x + 9x^{2}}$

c) $\frac{\mathrm{2} x}{\mathrm{8} x^{3}+ 12x^{2}+6x+1}$

$a,2x-3x^2\neq0 \Leftrightarrow x(2-3x)\neq0\Leftrightarrow x\neq 0;x\neq \frac{2}{3}$
$b,9x^2-24x+16\neq0\Leftrightarrow (3x-4)^2\neq0$
$c,8x^3+12x^2+6x+1\neq0\Leftrightarrow (2x+1)^3\neq0$
đúng thì tick chữ v bên cạnh cho a –  ๖ۣۜTQT☾♋☽ 10-12-16 01:21 AM

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