JEE Main & Advanced Mathematics Sequence & Series Question Bank Relation between AP., GP. and HP.

  • question_answer
    If G.M. = 18 and A.M. = 27, then H.M. is [RPET 1996]

    A)   \[\frac{1}{18}\]

    B)   \[\frac{1}{12}\]

    C) 12

    D) \[9\sqrt{6}\]

    Correct Answer: C

    Solution :

    \[\because \]\[{{G}^{2}}=AH\]\[\Rightarrow \]\[{{(18)}^{2}}=27H\]\[\Rightarrow \]\[H=12\].


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