Let one root of the quadratic equation in x:
be twice the other. Then the length of the latus rectum of the parabola is equal to:
be twice the other. Then the length of the latus rectum of the parabola is equal to:
- (A)4
- (B)6
- (C)8
- (D)12✓ Correct
Answer: (D)
Solution
Let the roots be and . Then and . Since , we get , which reduces to , i.e. , so . The equation is then with roots in ratio , and has latus rectum of length .
JEE Main · 2026 · 06 Apr 2026 · Shift 1 · Single correct option