If the set of all solutions of is , then is equal to :
- (A)9
- (B)18✓ Correct
- (C)36
- (D)72
Answer: (B)
Solution
Since , the equation is , which holds exactly when , i.e. . A sign chart gives , so and .
JEE Main · 2026 · 04 Apr 2026 · Shift 1 · Single correct option