Exercises: Combine Standard Function Types Using Arithmetic Operations

Work through each section in order. Show your work for all computation problems.

Grade 9·21 problems·~28 min·Common Core Math - HS Functions·standard·hsf-bf-a-1b

Work through problems with immediate feedback

Fluency Practice

Let $f(x) = \sqrt{x}$ (domain: $x \geq 0$ ) and $g(x) = x + 3$ (domain: all reals). What is the domain of $(f + g)(x)$ ?

All real numbers

$x \geq 0$

$x \geq -3$

All reals except $x = 0$