I'm supposed to apply the chain rule with the following question, and as far as I know, the chain rule is f '[g(x)] * g '(x).

According to the question, I need to find f[g(x)] and g[f(x)].

$\displaystyle f(x) = (x/8) + 7$ and $\displaystyle g(x) = 6x -1$

I thought I should simply just go as follows...

$\displaystyle (1/8)(6x -1) * 6$

=$\displaystyle (3/4)(6x - 1)$

$\displaystyle = (9x/2) - (3/4)$

This isn't the right answer, but I don't know what I'm doing wrong..