exam Maths Puzzle Numerical Ability

1/2=e^150x

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exam Other Question

Given f(x) and g(x), determine and simplify f[g(x)]
f(x) = 1-x^2/x, g(x) = sq. rt. of 1+x

I really have trouble with these types of functions. Any help you can give would be
graph each exponential function
A.)f(x)=2*(1/2)
B.)k(x)=3*()1/3
C.)h(x)=3*(3)
D.)g(x)=5*(1.2)