Published by:
CGP EDU Academic Team
Published on: August 14, 2026
If y is a function of x and log (x + y) – 2xy = 0, then y ′ (0) is equal to -
Text Solution
Verified by ExpertsThe correct answer is:
A
We have : log (x + y) – 2xy = 0 … (1)
Diff. w.r.t. x, 
– 2x 
– 2y = 0
⇒ 
= 2y – 
⇒ 
= 
.
When x = 0, from (1), log (y) = 0 ⇒ y = e 0 = 1.
∴ 
= 
= 
= 1.
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