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Let f(x)=cos((pi)/(x)),xne0 then assumin...

Let `f(x)=cos((pi)/(x)),xne0` then assuming k as an integer,

A

f(x) increses in the interval `((1)/(2k+1),(1)/(2k))`

B

f(x) decreses in the interval `((1)/(2k+1),(1)/(2k))`

C

f(x) decreses in the interval `((1)/(2k+2),(1)/(2k+1))`

D

f(x) increses in the interval `((1)/(2k+2),(1)/(2k+1))`

Text Solution

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The correct Answer is:
A, C
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