



 
Gilligan, The functions f, g and h do relatively straightforward things.
You can construct more complex functions however by taking the output of one function and making it the input to another function or even making it the input of the same function again. For example if you input x to h and take the output that h returns and input it to g then this is the composition g(h(x)). The result is
In the first step h outputs sqrt{x} + 1 and in the second step g outputs three times its input. So what about g(g(x))?
I hope this helps,  


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