Q.
9! = ..
11! = ..
nt : valid sih 
9! = ..
11! = ..
nt : valid sih
Penjelasan dengan langkah-langkah:
9!
9x8x7x6x5x4x3x2x1
=362.880
11!
11x10x9x8x7x6x5x4x3x2x1
=39.916.800
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