If nth derivative of y = ( frac{x}{(x+1)(x+2)} ) is yn = a(-1)n+! n! – McqOptions

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1.	If nth derivative of y = ( frac{x}{(x+1)(x+2)} ) is y_n = a(-1)^n+! n! (x+1)^-n-1 + b(-1)ⁿn!(x+2)^-n-1 then find the value of a and b.
A.	-1, -2
B.	2, 1
C.	1, 2
D.	-2, -1
Answer» D. -2, -1

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