1.

underset(n=1)overset(oo)sum.^(n)C_(0)+.^(n)C_(1)+underset(.^(n)P_(n))(.^(n)C_(2))+....+.^(n)C_(n)=

Answer»

`E-1`
`e+1`
`e^(2)-1`
`e^(2)+1`

ANSWER :C


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