Answer
a), c), e)
Work Step by Step
a) $v$ and $\overrightarrow{CE}$ have the same direction and magnitude, therefore
$v=\overrightarrow{CE}$.
b) $\dfrac{1}{2}\overrightarrow{HI}$ has the same magnitude as $\overrightarrow{CE}$, but not opposite direction.
$\dfrac{1}{2}\overrightarrow{HI}\not=\overrightarrow{CE}$
c) $\dfrac{1}{3}\overrightarrow{OA}$ has the same magnitude as $\overrightarrow{CE}$ and the same direction.
$\dfrac{1}{3}\overrightarrow{OA}=\overrightarrow{CE}$
d) $u$ doesn't have the same direction as $\overrightarrow{CE}$.
$u\not=\overrightarrow{CE}$
e) $\dfrac{1}{2}\overrightarrow{IH}$ has the same magnitude as $\overrightarrow{CE}$ and the same direction.
$\dfrac{1}{2}\overrightarrow{IH}=\overrightarrow{CE}$
So the true statements are a), c), e).
