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Please solve for both. I think i answered wrong

Algebra
Tutor: None Selected Time limit: 0 Hours

Apr 27th, 2015

(f o g)(x) = f ( g(x))

                 = f(5/x )

replace x as 5/x in f(x) that is in  6/(x-7)

thus,

                = 6/  (5/x) - 7

                 = 6 x / (5 -7x).................................................

(f o g)(x) = 6 x / (5 -7x).....................................ANSWER


f(x) and g(x) is defined for all values except  at x = 1/7 and x= 0


so answer is A

      DOMAIN OF   (f o g)(x) = x : x not equal to 1/7 ,0



   ............................................................



Apr 27th, 2015

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