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The value of 1 .1 !+2 .2 !+3 .3 !+..+n ....

The value of `1 .1 !+2 .2 !+3 .3 !+..+n .n !` is

A

`(n+1) !`

B

`(n+1) !+1`

C

`(n+1) !-1`

D

none of these

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The correct Answer is:
C
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