# Parabola (S .N. Dey ) | Ex-4 | Part-4

In the previous article, we have solved long answer type questions of Parabola Chapter . In this article, we have solved Short answer type questions of Parabola Chapter (Ex-4) ofÂ S.N.Dey mathematics, Class 11.

Find the axis, co-ordinates of vertex and focus, length of latus rectum , equation of

directrix and the co-ordinates of the ends of latus rectum for each of the following parabolas :

Solution.

So, the focus

Axis of the parabola positive axis.

Vertex

Length of the latus rectum

The equation of the directrix

The extremities of latus rectum :

Solution.

So, the focus

Axis of the parabola negative axis.

Vertex

Length of the latus rectum

The equation of the directrix

The extremities of latus rectum :

Solution.

So, the focus

Axis of the parabola positive axis.

Vertex

Length of the latus rectum

The equation of the directrix

The extremities of latus rectum :

Solution.

So, the focus

Axis of the parabola negative axis.

Vertex

Length of the latus rectum

The equation of the directrix

The extremities of latus rectum :

Solution.

So, the focus

Axis of the parabola parallel to axis.

Vertex

Length of the latus rectum

The equation of the directrix

The extremities of latus rectum :

Solution.

So, the focus

Axis of the parabola parallel to axis.

Vertex

Length of the latus rectum

The equation of the directrix

The extremities of latus rectum :

Solution.

Comparing the parabola with the general equation of parabola , we get

So, the focus

Axis of the parabola parallel to axis.

Vertex

Length of the latus rectum

The equation of the directrix  :

Solution.

Comparing the parabola with the general equation of parabola , we get

So, the focus

Axis of the parabola parallel to axis.

Vertex

Length of the latus rectum

The equation of the directrix  :