Let and be differentiable functions such that , and for all . Then
- (A)
- (B)✓ Correct
- (C)✓ Correct
- (D)
Answer: (B), (C)
Solution
From , differentiating: .
At : , , so , giving .
(A) False (source says but working gives ).
From , we have (since is the inverse of ).
So .
(C) . True.
(B) . At : , , . So . True.
At : , , so , giving .
(A) False (source says but working gives ).
From , we have (since is the inverse of ).
So .
(C) . True.
(B) . At : , , . So . True.
JEE Advanced · 2016 · 22 May 2016 · Paper 1 · One or more correct options