Please write the function correctly or confirm that it is written correctly. You can write as sqrt(z); however, this is not the biggest problem with the expression above.

There are many ways to represent a given function h(x) as a composition of f and g. For example, f(x) = h(x) and g(x) = x or f(x) = x and g(x) = h(x). So, "g(x) is = 1/square root of x+5" cannot bethecorrect answer unless the question provides more information.