JEE MATHEMATICS MCQ: DIFFERENTIATION

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Application +4 | -1

Let

f\left( {x + y} \right) = f\left( x \right)f\left( y \right)

for all

x,y \in R

f'\left( 1 \right) = 2

and

f\left( 4 \right) = 4

, then

f'\left( 4 \right)

equal to

View answer and explanation

Correct option: D

Option D (8) is correct because by using the given functional equation and derivative information, we can find f'(4).

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