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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 6

  • question_answer
    The sum of the terms of an infinitely decreasing G.P. is equal to the greatest value of the function \[f(x)={{x}^{3}}+3x-9\] on the interval [-4, 3] and the difference between the first and second terms is \[f'(0)\]. Then the value of 3 r (where r is common ratio) is­­­_________.

    Answer:

    2


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