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" 14.सिद्ध कीजिए कि "sum(r=0)^(n)3^(r)^(...

" 14.सिद्ध कीजिए कि "sum_(r=0)^(n)3^(r)^(n)C_(r)=4^(n)

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sum_(r=0)^(n).^(n)C_(r)4^(r)=..........

Prove that sum_(r=0)^(n) 3^( r" "n)C_(r ) =4^(n) .

Prove that sum_(r=0)^n3^r^n C_r=4^n .

Prove that: sum_(r=0)^(n) 3^( r) ""^(n)C_(r) = 4^(n) .

sum_(r=0)^(n)(""^(n)C_(r))/(r+2) is equal to :

sum_(r=0)^(n)(""^(n)C_(r))/(r+2) is equal to :

Evaluate sum_(r=0)^(n) ""^(n+r)C_(n) .

Prove that sum_(r=0)^n^n C_r3^r=4^n

The vaule of sum_(r=0)^(n-1) (""^(C_(r))/(""^(n)C_(r) + ""^(n)C_(r +1)) is equal to