Question: If (x) is an integrating factor for y'+ A(x)y = B(x), then '(x) is equal to (choose the correct answer): (a) B(x) (b) (x)A(x) (c)

If α(x) is an integrating factor for y'+ A(x)y = B(x), then α'(x) is equal to (choose the correct answer):
(a) B(x) 

(b) α(x)A(x)
(c) α(x)A'(x) 

(d) α(x)B(x)

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