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" If "Delta(k)=|[1,n,n],[2k,n^(2)+n+1,n^...

" If "Delta_(k)=|[1,n,n],[2k,n^(2)+n+1,n^(2)+n],[2k-1,n^(2),n^(2)+n+1]|" and "sum_(k=1)^(n)Delta_(k)=56," then "n" is equal to "

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If Delta_(k) = |(1,n,n),(2k,n^(2)+n+1,n^(2)+n),(2k-1,n^(2),n^(2)+n+1)|and sum_(k=1)^(n)Delta_(k)=56. then n equals a)4 b)6 c)8 d)None of these

if D_(k) = |{:( 1,,n,,n),(2k,,n^(2)+n+1 ,,n^(2)+n),(2k-1,,n^(2),,n^(2)+n+1):}|" and " Sigma_(k=1)^(n) D_(k)=56 then n equals

if D_(k) = |{:( 1,,n,,n),(2k,,n^(2)+n+1 ,,n^(2)+n),(2k-1,,n^(2),,n^(2)+n+1):}|" and " Sigma_(k=1)^(n) D_(k)=56 then n equals

if D_(k) = |{:( 1,,n,,n),(2k,,n^(2)+n+1 ,,n^(2)+n),(2k-1,,n^(2),,n^(2)+n+1):}|" and " Sigma_(k=1)^(n) D_(k)=56 then n equals

If D_k=|(1, n, n),(2k, n^2+n+1,n^2+n),(2k-1,n^2,n^2+n+1)| and sum_(k=1)^n D_k=56. then n equals

D_k=|(1,n,n),(2k,n^2+n+1,n^2+n),(2k-1,n^2,n^2+n+1)| and sum_(k=1)^nD_k=56 then n equals:

If Delta_(k) = |(k,1,5),(k^(2),2n +1,2n +1),(k^(3),3n^(2),3n +1)|, " then " sum_(k=1)^(n) Delta_(k) is equal to

If Delta_(k) = |(k,1,5),(k^(2),2n +1,2n +1),(k^(3),3n^(2),3n +1)|, " then " sum_(k=1)^(n) Delta_(k) is equal to

If D_k=|[1,n,n],[2k,n^2+n+2,n^2+n],[2k-1,n^2,n^2+n+2]| and sum_(k=1)^n D_k=48 ,then n equals (a)4 (b) 6 (c) 8 (d) none of these