Applications Of Derivatives Question 265
Question: The function $ f(x)=x,+,\cos x $ is
[DCE 2002]
Options:
A) Always increasing
B) Always decreasing
C) Increasing for certain range of x
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ f(x)=x+\cos x $
therefore $ {f}’(x)=1-\sin x $
$ {f}’(x)>0 $ for all values of x. \ $ f(x) $ is always increasing.
BETA
