Let f(x) = x2 + 6 and g(x)= x+8/x . Find ( g o f)( -7)
(g o f)(x)=g(f(x))so(g o f)(-7)=g(f(-7))=g((-7)^2+6)=g(49+6)=g(55)=55+8/55=55 ad 8/55(g o f)(-7)=55 and 8/55(if you meant g(x)=(x+8)/x, then the result is 63/55 or 1 and 8/55)
