Maths-
General
Easy
Question
If A = and f(x) = 2x2 – 3x, then f(A) equals -
-
-
-
- None of these
The correct answer is:
f(A) =
Related Questions to study
physics-
A point mass m is released from rest at a distance of 3R from the centre of a thin walled hollow sphere of radius R and mass M as shown. The hollow sphere is fixed in position and the only force on the point mass is the gravitational attraction of the hollow sphere. There is a very small hole in the hollow sphere through which the point mass falls as shown. The velocity of point mass when it passes through point P at a distance R/2 from centre of sphere, is
A point mass m is released from rest at a distance of 3R from the centre of a thin walled hollow sphere of radius R and mass M as shown. The hollow sphere is fixed in position and the only force on the point mass is the gravitational attraction of the hollow sphere. There is a very small hole in the hollow sphere through which the point mass falls as shown. The velocity of point mass when it passes through point P at a distance R/2 from centre of sphere, is
physics-General
physics-
A uniform solid sphere of radius R has a mass M.A spherical position of the sphere centred at distance R/2 from the centre C of the sphere and of radius R/2 is cut away and removed. The force of gravity due to the remaining mass of the sphere on unit mass at a point P at a distance 2R from C along CO will be (in magnitude)
A uniform solid sphere of radius R has a mass M.A spherical position of the sphere centred at distance R/2 from the centre C of the sphere and of radius R/2 is cut away and removed. The force of gravity due to the remaining mass of the sphere on unit mass at a point P at a distance 2R from C along CO will be (in magnitude)
physics-General
physics-
A planet of radius R has an acceleration due to gravity of gs on its surface. A deep smooth tunnel is dug on this planet, radially inward, to reach a point P located at a distance of from the centre of the planet. Assume that the planet has uniform density. The kinetic energy required to be given to a small body of mass m, projected radially outward from P, so that it gains a maximum altitude equal to the thrice the radius of the planet from its surface, is equal to
A planet of radius R has an acceleration due to gravity of gs on its surface. A deep smooth tunnel is dug on this planet, radially inward, to reach a point P located at a distance of from the centre of the planet. Assume that the planet has uniform density. The kinetic energy required to be given to a small body of mass m, projected radially outward from P, so that it gains a maximum altitude equal to the thrice the radius of the planet from its surface, is equal to
physics-General
physics-
One of the following figures represents the variation of particle momentum with associated de Broglie wavelength
One of the following figures represents the variation of particle momentum with associated de Broglie wavelength
physics-General
physics-
A neutron, a proton, an electron and an alpha particle enter a region of constant magnetic field with equal velocities. The magnetic field is along the inward normal to the plane of the paper. The tracks of the particles are labled in the figure. The electron follows ____ track and alpha particle follows track ______
A neutron, a proton, an electron and an alpha particle enter a region of constant magnetic field with equal velocities. The magnetic field is along the inward normal to the plane of the paper. The tracks of the particles are labled in the figure. The electron follows ____ track and alpha particle follows track ______
physics-General
maths-
If A = and A2 + kI = 8A, then k equals -
If A = and A2 + kI = 8A, then k equals -
maths-General
maths-
If A and B are matrices of order m × n and n × n respectively, then which of the following are defined -
If A and B are matrices of order m × n and n × n respectively, then which of the following are defined -
maths-General
physics-
A small body of mass slides down from the top of a hemisphere of radius . The surface of block and hemisphere are frictionless. The height at which the body lose contact with the surface of the sphere is
A small body of mass slides down from the top of a hemisphere of radius . The surface of block and hemisphere are frictionless. The height at which the body lose contact with the surface of the sphere is
physics-General
physics-
A particle is moving on a circular path of radius with uniform velocity . The change in velocity when the particle moves from P to Q is
A particle is moving on a circular path of radius with uniform velocity . The change in velocity when the particle moves from P to Q is
physics-General
physics-
In the following diagram if then
In the following diagram if then
physics-General
chemistry-
chemistry-General
physics-
The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position A are (0,(b) . The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are
The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position A are (0,(b) . The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are
physics-General
physics-
The path of a projectile in the absence of air drag is shown in the figure by dotted line. If the air resistance is not ignored then which one of the path shown in the figure is appropriate for the projectile
The path of a projectile in the absence of air drag is shown in the figure by dotted line. If the air resistance is not ignored then which one of the path shown in the figure is appropriate for the projectile
physics-General
physics-
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first
Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first
physics-General
physics-
A solid disc rolls clockwise without slipping over a horizontal path with a constant speed . Then the magnitude of the velocities of points A, B and C (see figure) with respect to a standing observer are respectively
A solid disc rolls clockwise without slipping over a horizontal path with a constant speed . Then the magnitude of the velocities of points A, B and C (see figure) with respect to a standing observer are respectively
physics-General