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Determine Whether the Function Is Periodic $f ( x ) = \left| \cos \frac { 1 } { 4 } x \right|$

Question 403

Multiple Choice

Determine whether the function is periodic. If it is periodic, find the period.
- $f ( x ) = \left| \cos \frac { 1 } { 4 } x \right|$

A) $4 \pi$
B) Not periodic
C) $2 \pi$
D) $\pi$

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