Home Maths Differentiation and Applications of Derivatives JEE Main 2019 If , then at is equal to :
Maths Differentiation and Applications of Derivatives JEE Main 2019 Single Correct MCQ
Published on: August 12, 2026

If , then at is equal to :

A
B
C
D

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The correct answer is:
B

JEEN Main 2019

Consider the equation,

Differentiate both sides w.r.t. ,

… (i)

When . Put these values in (i),

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