If $a,\;b,\;c$ are in $H.P.$, then for all $n \in N$ the true statement is

  • A

    ${a^n} + {c^n} < 2{b^n}$

  • B

    ${a^n} + {c^n} > 2{b^n}$

  • C

    ${a^n} + {c^n} = 2{b^n}$

  • D

    None of the above

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