factorial x ka differential

x!   x has to be a natural number

x!= (x-0)(x-1) .....(x-x)

so it gives a polynomial with roots 0,1,2,.......x

degree x+1

so the polynomial is

x^(x+1) + x^x+............+constant

when you differentiate

constant tem will become 0 and for rest of terms you can find the differential cofficient

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