sum_(0leqslant i

sum_(0 leqiltj) sum_( leqn) (C_i+C_j)^2=

The sum sum_(0 leq i)sum_(leq j leq 10) (10C_j)(jC_i) is equal to

Evaluate sum_(0 le i lne j le 10) ""^(21)C_(i) * ""^(21)C_(j) .

" If the function "f(x)=x^(2)+bx+3" is not injective for values of "x" in the interval "0leqslant x leqslant1" then "b" lies in "

Find the sum (i)sum_(0lei < jlen)sum . ^ nC_i .^ nC_j (ii)sum_(0lei le jlen)sum . ^ nC_i .^ nC_j (iii)sum_(i!=j).^ nC_i .^ nC_j

sum sum_ (0 <= i

Find the sum sumsum_(0leiltjlen)"^nC_i

Find the sum sumsum_(0leiltjlen)"^nC_i

Find the sum sumsum_(0leiltjlen)"^nC_i

Evaluate sum_(0 le i le j le 10) ""^(21)C_(i) * ""^(21)C_(j) .