9000029303
Level:
B
In the following list identify an inequality which does not have solution in
\(\mathbb{R}\).
\(x^{4} + 81 < 0\)
\((x - 3)^{3} > 0\)
\(x^{3} - 9x < 0\)
\(4x^{4} - 64 > 0\)
Higher Degree Equations and Inequalities
9000031003
Level:
B
Assuming \(x\in \mathbb{R}\),
solve the following algebraic equation.
\[
x^{4} + 4x^{2} - 5 = 0
\]
\( \{ - 1,1\}\)
\( \{1\}\)
\( \{ -\sqrt{5},-1,1,\sqrt{5}\}\)
\( \emptyset \)
9000029307
Level:
B
In the following list identify an inequality which holds for every
\(x\in \mathbb{R}\).
\(- x^{4} - x^{2}\leq 0\)
\(x^{3} + 3x^{2} + 3x + 1 > 0\)
\(x^{4} + x^{2} + 1 < 0\)
\(- x^{3} + 6x^{2} - 12x + 8 > 0\)
9000031005
Level:
B
Assuming \(x\in \mathbb{R}\),
solve the following algebraic equation.
\[
(x + 1)^{4} - 5(x + 1)^{2} + 4 = 0
\]
\( \{ - 3,-2,0,1\}\)
\( \{1,4\}\)
\( \{ - 2,-1,1,2\}\)
\( \{ - 1,3\}\)
9000031001
Level:
B
Find the sum of all real roots of the following equation.
\[
(3x - 1)(2x + 1)(4x^{2} + 3x - 1) = 0
\]
\(-\frac{11}
{12}\)
\(- \frac{1}
{12}\)
\(-\frac{1}
{6}\)
\(\frac{1}
{6}\)
9000031006
Level:
C
The following equation has a double solution
\(x = 1\). Find
all solutions.
\[
x^{4} + 2x^{3} - 3x^{2} - 4x + 4 = 0
\]
\(K = \{ - 2,1\}\)
\(K = \{ - 2,1,2\}\)
\(K = \{ - 2,0,1\}\)
another answer
9000031004
Level:
B
Assuming \(y\in \mathbb{R}\),
find the number of the solutions of the following algebraic equation.
\[
y^{4} + 5y^{2} + 6 = 0
\]
\(0\)
\(4\)
\(3\)
\(2\)
9000031008
Level:
B
Assuming \(x\in \mathbb{R}\),
solve the following equation.
\[
4x^{3} - 3x^{2} - x = 0
\]
\( \left \{-\frac{1}
{4},0,1\right \}\)
\(\{0,1,4\}\)
\( \{1,4\}\)
\( \{0\}\)
9000031007
Level:
C
Find the sum of the solutions of the following equation.
\[
x^{3} + 2x^{2} - x - 2 = 0
\]
\(- 2\)
\(3\)
\(- 3\)
\(- 1\)
9000031010
Level:
B
Identify a true statement on the following equation.
\[
x^{5} - x^{3} - 6x = 0
\]
The equation has three solutions in \(\mathbb{R}\).
The equation does not have solution in
\(\mathbb{R}\).
The equation has five solutions in \(\mathbb{R}\).
The equation has one solution in \(\mathbb{R}\).