Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If x y . y x = 16 then 
at (2, 2) is -
Text Solution
Verified by ExpertsThe correct answer is:
A
x y y x = 16
∴ log e x y + log e y x = log e 16
⇒ y log e x + x log e y = 4 log e 2
Now differentiating both side w.r.t.x
+ log e x 
+ 
+ log e y . 1 = 0
∴ 
= – 
∴ 
= – 
= – 1.
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