JEE MATHEMATICS MCQ: DIFFERENTIATION

1 Easy

1 of 1

Application +4 | -1

f\left( x \right) = 10\cos x + \left( {13 + 2x} \right)\sin x,

then

f''\left( x \right) + f\left( x \right)

is equal to

View answer and explanation

Correct option: B

4\cos x

Option B (

4\cos x

) is correct because after finding the second derivative and adding it to the original function, the terms simplify to

4\cos x

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