If the set of all , for which the equation has no real root, is the interval , and , then is equal to
- (A)2109
- (B)2129
- (C)2139✓ Correct
- (D)2119
Answer: (C)
Solution
Write the equation as . For no real root, the discriminant is negative:
So , giving .
.
So , giving .
.
JEE Main · 2025 · 29 Jan 2025 · Shift 2 · Single correct option