Question

f(x)=2/x and g(x)= sqrt x

1) f+g
2) g(f(x))
3) f(g(x))

Answer 1

for the first one, put a plus sign between \(f\) and \(g\)

Answer 2

for the second one, start with
\[g(f(x))=g(\frac{2}{x})\] then since \(g(\spadesuit)=\sqrt{\spadesuit}\) you have
\[g(\frac{2}{x})=\sqrt{\frac{2}{x}}\]