Question

please help me match these

Answer 1

Explanation:

let take a point P(x,y) on the parabola such that, PE=PB ... (i)

Also, by distance formula,

PF=

(x−a)

2

+y

2

PB=

(x+a)

2

since, PF=PB [from (i)] , we get

(x−a)

2

+y

2

=

(x+a)

2

by squaring both sides

⇒(x−a)

2

+y

2

=(x+a)

2

⇒x

2

−2ax+a

2

+y

2

=x

2

+2ax+a

2

further, by solving we have

y

2

=4ax[a,0]Derive the equation of parabola in the standard

form, that is y2 = 4ax

Answer 2

Answer:

1) D

2) A

3) E

4) C

5) B

Hope it will help u