CPM Homework Help : A2C Problem 2-105

Describe the domain of each function or sequence below.

The function $f(x)=3x−5$ .
Hint (a):
The domain is any value of $x$ that yields a real number value for $y$ .

The sequence $t(n)=3n−5$ .
Hint (b):
Keep in mind that this is a sequence, not a function.
Answer (b):
$1, 2, 3...$

The function $f(x) =\frac { 5 } { x }$ .
Hint (c):
Can $5$ be divided by any number?
Answer (c):
$x$ cannot equal zero.

The sequence $t(n)=\frac{5}{n}$ .
Hint (d):
Keep in mind that this is a sequence, not a function.

Click on each graph in the eTool below to help you determine the domain of each function or sequence.
Click on the link at right for the full eTool version: 5-123 HW eTool