Let Delta(a)=|{:((a-1),n,6),((a-1)^(2), ...

Let `Delta_(a)=|{:((a-1),n,6),((a-1)^(2), 2n^(2),4m-2),((a-1)^(3),3n^(3),3n^(2)-3n):}|` the value of `sum_(a=1)^(n)Delta_(a)` is

A

0

B

1

C

`{(n(n+1))/(2)} {(a(a +1))/(2)}`

D

none of these

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The correct Answer is:

A

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