Q .     Let `a_n = 10^n/(n!)`, where `n=1,2,3,4;` then the greatest value of n for which the value `a_n ` is greatest:

EAMCET 2010
A

`11`

B

`20`

C

`10`

D

`8`

HINT

Sometimes the data given as options have to be used for trial and error computations which may save time as well as turns out to be lucky. In this case, the value of n is calculated by calculating only `a_8,`
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