The sum 1(1!) + 2(2!) + 3(3!) + ....+n (n!) equals [AMU 1999; DCE 2005]

The sum 1(1!) + 2(2!) + 3(3!) + ....+n (n!) equals [AMU 1999; DCE 20

1.	The sum 1(1!) + 2(2!) + 3(3!) + ....+n (n!) equals [AMU 1999; DCE 2005]
A.	\[3\,(n\,!)\,+\,n-3\]
B.	\[(n+1)!\,-\,(n-1)!\]
C.	\[(n+1)\,!\,-1\]
D.	\[2\,(n\,!)-2n-1\]
Answer» D. \[2\,(n\,!)-2n-1\]

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The sum 1(1!) + 2(2!) + 3(3!) + ....+n (n!) equals [AMU 1999; DCE 2005]

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