The following determinant is equal to:
For what value of \( k \), does the equation \[ 9x^2 + y^2 = k(x^2 - y^2 - 2x) \] represent the equation of a circle?
The equation of the hyperbola with vertices at
is:
The relationship between \( a \) and \( b \) so that the function \( f(x) \) defined by
is continuous at \( x = 3 \), is:
The local minimum value of the function \[ f(x) = 3 + |x|, \quad x \in \mathbb{R} \] is:
A parabola has the origin as its focus and the line \( x = 2 \) as the directrix. Then the vertex of the parabola is at:
The value of the integral \[ \int_0^{\frac{\pi}{2}} \frac{\sqrt{\sin x}}{\sqrt{\sin x} + \sqrt{\cos x}} \, dx \] is:
The variance of the data \( 2, 4, 6, 8, 10 \) is:
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:
How many students have got 60% or more marks in all the subjects?