Question

how many largest is 13x2_7 y2 than​

Answer 1

Answer: 136(x  

2

+y  

2

)=(5x+3y+7)  

2

 

⇒(x−0)  

2

+(y−0)  

2

=  

136

1

​  

(5x+3y+7)  

2

 

⇒(x−0)  

2

+(y−0)  

2

=(  

2

1

​  

)  

2

(  

34

​  

 

5x+3y+7

​  

)  

2

 

From the above form, we get focus of the conic has coordinates (0,0), and directrix has equation 5x+3y+7=0 and eccentricity e=  

2

1

​  

 

Distance between focus and directrix =  

34

​  

 

7

​  

 

Length of latus rectum=2  

a

b  

2

 

​  

=2×e× distance bet. focus and directrix=2×  

2

1

​  

×  

34

​  

 

7

​  

 

=  

34

Y7

​  

 

Hence, option B.

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