The arithmetic mean of \( a, a+d, a+2 d \ldots, a+2 n d \) is.... VIDEO
The arithmetic mean of \( a, a+d, a+2 d \ldots, a+2 n d \) is
(1) \( a+(n-1) d \)
(2) \( a+(n+1) d \)
\( \mathrm{P} \)
(3) \( a+(n+2) d \)
(4) None of these
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