Question

Let f(x) = x^2+6 and g(x) = x+8/x . Find (g•f)(-7)

Answer 1

63/55

Explanation:

i took the exam

Answer 2

If:
x = - 7

We know that:

`f(x) = x^2 + 6` →
`f(-7) = (-7)^2 + 6 = 49 + 6 = 55`

`g(x) = (x+8)/(x)`

Soon:

`(gof)(f(-7)) = (x+8)/(x)`

`(gof)(55) = (55+8)/(55)`

`\boxed{\boxed{(gof)(55) = (63)/(55)}}\end{array}}\qquad\quad\checkmark`