Question 771950
find each using: f(x)= x^2+ 3x+ 1 and g(x)= 1/(x+4)
A) 


f(g(x)) =  (1/(x+4))^2+3(1/(x+4))+1

= 1/(x+4)^2+3/(x+4)+1



B) 


f(x+h)  = (x+h)^2+3(x+h)+1 = x^2+2hx+h^2+3x+3h+1 

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