Chapter 1.2, Problem 1E

Exercises 1-8 are based on the following functions:

$f\left(x\right)=x^2+1$ with domain $\left(-\infty ,+\infty \right)$

$g\left(x\right)=x-1$ with domain $\left(-\infty ,+\infty \right)$

$h\left(x\right)=x+4$ with domain $\left[10,+\infty \right)$

$u\left(x\right)=\sqrt{x+10}$ with domain $\left[-10,0\right)$

$v\left(x\right)=\sqrt{10-x}$ with domain $\left[0,10\right]$

In each exercise, (a) write a formula for the indicated function, (b) give its domain, and (c) specify its value at the given point a, if defined

$s=f+g;a=-3$