Let be a point on the parabola . If P also lies on the chord of the parabola whose mid point is . Then is equal to ______.
Answer: 192
Solution
The chord of with midpoint has equation :
.
lies on this line: ... (i)
also lies on : ... (ii)
Substituting (i) into (ii):
.
Correspondingly .
— same value for either root.
.
lies on this line: ... (i)
also lies on : ... (ii)
Substituting (i) into (ii):
.
Correspondingly .
— same value for either root.
JEE Main · 2024 · 29 Jan 2024 · Shift 2 · Integer answer