જો $(1 + x)^{15} = C_0 + C_1x + C_2x^2 + ...... + C_{15}x^{15}$ હોય,તો $C_2 + 2C_3 + 3C_4 + .... + 14C_{15} = $

  • A
    $14 \cdot 2^{14}$
  • B
    $13 \cdot 2^{14} + 1$
  • C
    $13 \cdot 2^{14} - 1$
  • D
    આમાંથી કોઈ નહીં

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જો $\sum\limits_{k=1}^{31} \binom{31}{k} \binom{31}{k-1} - \sum\limits_{k=1}^{30} \binom{30}{k} \binom{30}{k-1} = \frac{\alpha(60!)}{(30!)(31!)}$,જ્યાં $\alpha \in R$,તો $16\alpha$ ની કિંમત કેટલી થાય?

જો $(1 - x + x^2)^n = a_0 + a_1x + a_2x^2 + .... + a_{2n}x^{2n}$ હોય,તો $a_0 + a_2 + a_4 + .... + a_{2n} = $

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$0, 1, 2, \dots, n$ કિંમતોનો મધ્યક,જેના અનુરૂપ ભાર (weights) અનુક્રમે $^nC_0, ^nC_1, ^nC_2, \dots, ^nC_n$ છે,તે શોધો.

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$\sum\limits_{r = 0}^{n - 1} {\frac{{^n{C_r}}}{{^n{C_r} + {\,^n}{C_{r + 1}}}}} $ નું મૂલ્ય શું થાય?

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ધારો કે $(1+x)^{10} = \sum_{r=0}^{10} c_{r} x^{r}$ અને $(1+x)^{7} = \sum_{r=0}^{7} d_{r} x^{r}$. જો $P = \sum_{r=0}^{5} c_{2r}$ અને $Q = \sum_{r=0}^{3} d_{2r+1}$ હોય, તો $\frac{P}{Q}$ ની કિંમત શોધો:

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