The following determinant is equal to:
The variance of the data \( 2, 4, 6, 8, 10 \) is:
The function \( f(x) \) is given by:
For the parabola \( y^2 = -12x \), the equation of the directrix is \( x = a \). The value of \( a \) is:
The local minimum value of the function \[ f(x) = 3 + |x|, \quad x \in \mathbb{R} \] is:
For what value of \( k \), does the equation \[ 9x^2 + y^2 = k(x^2 - y^2 - 2x) \] represent the equation of a circle?
If the system of linear equations \[ x + ky + 3z = 0, \quad 3x + ky - 2z = 0, \quad 2x + 4y - 3z = 0 \] has a non-zero solution \( (x, y, z) \), then \( \frac{xz}{y^2} \) is equal to:
The equation of the hyperbola with vertices at
is:
The principal value of \(\sin^{-1} \left( \sin \frac{5\pi}{3} \right)\) is: