Are $-\frac{1}{2}, -\frac{1}{2}, -\frac{1}{2}, -\frac{1}{2}, \ldots$ in an $AP$? If they form an $AP$,find the common difference $d$ and write three more terms.

  • A
    Yes,$d = 0$; next three terms are $-\frac{1}{2}, -\frac{1}{2}, -\frac{1}{2}$
  • B
    Yes,$d = -\frac{1}{2}$; next three terms are $-1, -\frac{3}{2}, -2$
  • C
    No,it is not an $AP$
  • D
    Yes,$d = 1$; next three terms are $\frac{1}{2}, 1, \frac{3}{2}$

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