Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa

If line   \mathrm {x+2 y=2 }  intersect parabola  \mathrm { y^2=8 x }   at points   \mathrm { A }  and  \mathrm { B }  , then \mathrm { 2\left(\frac{1}{S A}+\frac{1}{S B}\right)=...........} {'S' is focus}

Option: 1

1


Option: 2

2


Option: 3

3


Option: 4

\frac{1}{2}


Answers (1)

best_answer

Focus  \equiv(2,0) 
\Rightarrow  Line is focal chord and \mathrm {S A, S B}  are length of segments of focal chord.
\mathrm { \frac{1}{S A}+\frac{1}{S B}=\frac{S A+S B}{S A \cdot S B}=\frac{1}{a}=\frac{1}{2} }

Posted by

Pankaj Sanodiya

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2026: IIT Roorkee’s ECE emerges as top choice after CSE; closing rank rises
anam-khan

JEE Main 2026 application correction begins on jeemain.nta.nic.in; edit details by December 2
anam-khan

JEE Mains 2026 LIVE: NTA to conduct session 1 from January 21 to 30; exam pattern, syllabus

Latest Question