If n is an integer greater than 1, then \[a{{-}^{n}}{{C}_{1}}(a-1){{+}^{n}}{{C}_{2}}(a-2)+....+{{(-1)}^{n}}(a-n)=\] [IIT 1972]

If n is an integer greater than 1, then \[a{{-}^{n}}{{C}_{1}}(a-1){{+}

1.	If n is an integer greater than 1, then \[a{{-}^{n}}{{C}_{1}}(a-1){{+}^{n}}{{C}_{2}}(a-2)+....+{{(-1)}^{n}}(a-n)=\] [IIT 1972]
A.	\[a\]
B.	0
C.	\[{{a}^{2}}\]
D.	\[{{2}^{n}}\]
Answer» C. \[{{a}^{2}}\]

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If n is an integer greater than 1, then \[a{{-}^{n}}{{C}_{1}}(a-1){{+}^{n}}{{C}_{2}}(a-2)+....+{{(-1)}^{n}}(a-n)=\] [IIT 1972]

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