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[" Q.11Let "Delta r=|[r-1,n,6],[r-1,2n^(...

[" Q.11Let "Delta r=|[r-1,n,6],[r-1,2n^(2),4n-2],[r-1,3n^(3),3n^(2)-3n]|" .Show that "sum_(r=1)^(n)Delta_(r)" is constant."],[[" (1) "lig_(y)(del)/(del x)," and ",3n^(2)-3n]]

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Let Delta_r=|[r-1,n,6],[(r-1)^2,2n^2,4n-2],[(r-1)^3,3n^3,3n^2-3n]| . Show that sum_(r=1)^n Delta_r is contant.

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

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

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