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The number of values in set of values of...

The number of values in set of values of `r` for which
`""^23 C_r+2 ""^(23)C_(r+1)+ ""^(23)C_(r+2)ge ""^(25)C_(15)` is

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CENGAGE PUBLICATION-BINOMIAL THEOREM-All Questions
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  3. The number of values in set of values of r for which ""^23 Cr+2 ""^(2...

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  10. The coefficient of three consecutive terms in the expansion of (1+x)^n...

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  11. The sum of G. P 3, 6, 12,... 1536.

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  20. In the expansion of (1+3x+2x^(2))^(6), find the coefficient of x^(11).

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