For the following $APs,$ $3, 1, -1, -3, \ldots$ write the first term and the common difference.

  • A
    $a = 3, d = 0$
  • B
    $a = 3, d = -1$
  • C
    $a = 3, d = -2$
  • D
    $a = 1, d = -2$

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