Q11 of 137 Page 19

#Mark the correct alternative in each of the following

At f(x) = 2sin 3x + 3 cos 3x is




f’(x)=0


⇒6 cos 3x – 9 sin 3x = 0


⇒6 cos 3x = 9 sin 3x





So, at neither is maximum nor minimum


Option(D)

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