$\sum_{r=0}^{6} \left({}^{6}C_{r} \cdot {}^{6}C_{6-r}\right)$ નું મૂલ્ય કેટલું થાય?

  • A
    $1124$
  • B
    $1134$
  • C
    $1024$
  • D
    $924$

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જો ${}^{21}C_1 + 3 \cdot {}^{21}C_3 + 5 \cdot {}^{21}C_5 + \dots + 19 \cdot {}^{21}C_{19} + 21 \cdot {}^{21}C_{21} = k$ હોય,તો $k$ ના અવિભાજ્ય અવયવોની સંખ્યા કેટલી થાય?

જો $(1+x)^n = C_0 + C_1 x + C_2 x^2 + \ldots + C_n x^n$ હોય,તો $C_0 + 2 C_1 + 3 C_2 + \ldots + (n+1) C_n$ ની કિંમત શોધો.

જો $C_r = ^{100}C_r$ હોય,તો $1 \cdot C_0^2 - 2 \cdot C_1^2 + 3 \cdot C_2^2 - 4 \cdot C_3^2 + \dots + 101 \cdot C_{100}^2$ ની કિંમત શોધો.

$^nC_0 - \frac{1}{2} ^nC_1 + \frac{1}{3} ^nC_2 - \dots + (-1)^n \frac{^nC_n}{n+1} = $

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ધારો કે $(1 + x)^m = C_0 + C_1x + C_2x^2 + C_3x^3 + . . . + C_mx^m$,જ્યાં $C_r = {}^mC_r$ અને $A = C_1C_3 + C_2C_4 + C_3C_5 + . . . + C_{m-2}C_m$ હોય,તો નીચેનામાંથી કયું વિધાન અસત્ય છે?

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