Level:
Project ID:
9000029307
Accepted:
1
In the following list identify an inequality which holds for every
\(x\in \mathbb{R}\).
\(- x^{4} - x^{2}\leq 0\)
\(x^{3} + 3x^{2} + 3x + 1 > 0\)
\(x^{4} + x^{2} + 1 < 0\)
\(- x^{3} + 6x^{2} - 12x + 8 > 0\)