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KVPY Sample Paper KVPY Stream-SX Model Paper-6

  • question_answer
    The value of \[\sum\limits_{r=1}^{n}{{{(-1)}^{r-1}}\left( 1+\frac{1}{2}+\frac{1}{3}+.....+\frac{1}{r} \right)}\,\,{}^{n}{{C}_{r}}\]  equal to

    A) \[-1\]                            

    B) \[\frac{1}{r}\]

    C) \[\frac{1}{n}\]

    D) \[-\frac{1}{n}3.\]

    Correct Answer: C

    Solution :

                             Not Available


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