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(11C0)/1+(11C1)/2+(11C2)/3+........+(11C...

`(11C_0)/1+(11C_1)/2+(11C_2)/3+........+(11C_10)/11=`

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Evaluate : 2C_0+(2^2C_1)/2+(2^3C_2)/3+........+(2^11C_10)/11 .

(C_(0))/(1)+(C_(1))/(2)+C_(2)/(3)+.........+(C_(10))/(11)=

(C_(0))/(1)+(C_(1))/(2)+(C_(2))/(3)+.......+(C_(10))/(11) is equal to C_(r)-10C_(r))

If "^(10)C_(0)+^(11)C_(1)+^(12)C_(2)+.........^(100)C_(90)=^(x)C_(y) then (x-y)/(11) is

11C_(2)r=11C_(r+2)

(.1^(11)C_(0))/(1)+(.^(11)C_(1))/(2)+(.^(11)C_(2))/(3)+....+(.1^(11)C_(10))/(11)

Prove that 3*""^10C_0+3^2*(""^10C_1)/2+3^3*(""^10C_2)/3+...3^11*(""^10C_10)/11=(4^11-1)/11

2C_(0)+(2^(2))/(2)C_(1)+(2^(3))/(3)C_(2)+..........+(2^(11))/(11)C_(10)=?

Find the sum 2C_0+(2^2)/2C_1+(2^3)/3C_2+(2^4)/4C_3+........+(2^(11))/(11)C_(10)dot