If , then at , is equal to
- (A)2✓ Correct
- (B)
- (C)
- (D)1
Answer: (A)
Solution
Using and , write :
Numerator .
Denominator .
Since the numerator is exactly , the denominator factors as , and so
Differentiating, and .
At : , giving .
Numerator .
Denominator .
Since the numerator is exactly , the denominator factors as , and so
Differentiating, and .
At : , giving .
JEE Main · 2024 · 05 Apr 2024 · Shift 2 · Single correct option