If $a_m$ denotes the mth term of an $A.P.$ then $a_m$ =
If $a_m$ denotes the mth term of an $A.P.$ then $a_m$ =
- A
$\frac{2}{{{a_{m + k}} + {a_{m - k}}}}$
- B
$\frac{{{a_{m + k}} - {a_{m - k}}}}{2}$
- C
$\frac{{{a_{m + k}} + {a_{m - k}}}}{2}$
- D
None of these
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