यदि (1)/(x(x+1)(x+2)..(x+n))= (A(0))/(x)...

यदि `(1)/(x(x+1)(x+2)..(x+n))= (A_(0))/(x) +(A_(1))/(x+1) + (A_(2))/(x+2) + …+ (A_(n))/(x+n)` तो `A_(r)=`

`(r! (-1)^( r))/((n-r)!)`

`((-1)^(r ))/(r!(n-r)!)`

`(1)/(r!(n-r)!)`

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