Question

pls answer it step by step
در​

Answer 1

• Answer:

option 1)8/3

Step-by-step explanation:

Given directrix is x=4

Eccentricity=

2

1

Focus is at (0,0)

Shifting focus to (h,0) such that centre becomes (0,0).

Equation of directrix becomes x=4+h which gives

Distance between center and focus i.e, ae=h and

Distance between center and directrix i.e,

e

a

=4+h

Solving for a

e=

2

1

⇒a=2h and 2a=4+h

2a=4+

2

a

⇒a= 8/3