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The sum of the series 10 20 r =0 Cr is 219 + 20 C10/2

0 13 Views | Posted 3 months ago
Asked by Shiksha User

  • 1 Answer

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    Answered by

    Vishal Baghel | Contributor-Level 10

    3 months ago

    This is a True or False Type Questions as classified in NCERT Exemplar
    Sol:

    ∑ r = 0 1 0 C r 2 0 = C 0 2 0 + C 1 2 0 + C 2 2 0 + C 3 2 0 + … + C 1 0 2 0                                   = C 0 2 0 + C 1 2 0 + … + C 1 0 2 0 + C 1 1 2 0 + … + C 2 0 2 0 − ( C 1 1 2 0 + … + C 2 0 2 0 )                                   = 2 2 0 − ( C 1 1 2 0 + … + C 2 0 2 0 ) H e n c e ,     t h e     g i v e n     s t a t e m e n t     i s     ' F a l s e '

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