Let \( \Delta=\left|\begin{array}{ccc}a & a+d & a+2 d \\ a+d & a+2 d & a \\ a+2 d & a & a+d\end{...

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Let \( \Delta=\left|\begin{array}{ccc}a & a+d & a+2 d \\ a+d & a+2 d & a \\ a+2 d & a & a+d\end{array}\right| \), then
(a) \( \Delta \) depends on \( a \)
(b) \( \Delta \) depends on \( d \)
(c) \( \Delta \) is \( a \) constant
(d) Both \( (a) \) and (b)
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