# Chapter 1 - Functions and Limits - 1.3 New Functions from Old Functions - 1.3 Exercises: 49

$R(x)$ = $(f\circ g\circ h)(x)$ for $h(x)=\sqrt{x},$ $g(x)=x-1$, and $f(x)=\sqrt{x}$

#### Work Step by Step

$(f\circ g\circ h) (x)=f[g(h(x))]$ If we used a calculator, step by step, for each step, define the operation we would perform on the current result. Starting with x, we would 1. calculate $\sqrt{x},\ \ \ h(x)=\sqrt{x}$ 2. subtract 1 from the current result, $\ \ g(x)=x-1$ 3. if the current result was R, calculate $\sqrt{R},\ \ \ f(x)=\sqrt{x}$ $R(x)$ = $(f\circ g\circ h)(x)$ for $h(x)=\sqrt{x}, g(x)=x-1$, and $f(x)=\sqrt{x}$

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