Rational equations and inequalities

1003029104

Level: 
B
Find the domain of the expression on the left side of the inequality. \[ \frac{x^3-x^2+1}{\left(x^2+9\right)\left(x^3-1\right)}>0 \]
\( \mathbb{R}\setminus\left\{1\right\} \)
\( \mathbb{R} \)
\( \mathbb{R}\setminus\left\{\pm1\right\} \)
\( \mathbb{R}\setminus\left\{\pm3;\pm1\right\} \)

1003029103

Level: 
B
Find the domain of the expression on the left side of the inequality. \[\frac{x^4}{x^2\left(x^5-1\right)\left(2x^2-4\right)}\leq0 \]
\( \mathbb{R}\setminus\left\{0;1;\pm\sqrt2\right\}\)
\( \mathbb{R}\setminus\left\{1;\pm\sqrt2\right\}\)
\( \mathbb{R}\setminus\left\{\pm1;\pm\sqrt2\right\}\)
\( \mathbb{R}\setminus\left\{0;\pm1;\pm\sqrt2\right\}\)