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JEE Main & Advanced JEE Main Solved Paper-2016

  • question_answer
    If the 2nd, 5th and 9th terms of a non-constant A.P. are in G.P., then the common ratio of this G.P. is :- [JEE Main Solved Paper-2016 ]

    A) \[\frac{7}{4}\]                                   

    B) \[\frac{8}{5}\]

    C) \[\frac{4}{3}\]                                   

    D) 1

    Correct Answer: C

    Solution :

                    Let 'a' be the first term and d be the common Difference 2nd term = a + d, 5th term = a + 4d, 9th term = 4 + 8d \[\therefore \]Common ratio \[=\frac{a+4d}{a+d}=\frac{a+8d}{a+4d}=\frac{4d}{3d}=\frac{4}{3}\]


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