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If Deltar=|(r,2r-1,3r+2),(n/2,n-1,a),(1...

If `Delta_r=|(r,2r-1,3r+2),(n/2,n-1,a),(1/2n(n-1),(n-1)^2,1/2(n-1)(3n+4))|` then the value of `sum_(r=1)^(n-1) Delta_r` (1) depends only on n (2) is independent of both a and n (3) depends only on a (4) depends both on a and n

A

depends only on a

B

depends only on n

C

depends both on a and n

D

is independent of both a and n.

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The correct Answer is:
D
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