Examples

f (x) = x

$f (x) = x$ ,

$g (x) = 2 x$

Step 1

Find the sum of the functions.

Tap for more steps...

Step 1.1

Replace the function designators with the actual functions in

$f (x) + g (x)$ .

$x + 2 x$

Step 1.2

Add

$x$ and

$2 x$ .

$3 x$

Step 2

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${x | x \in ℝ}$

Step 3

Enter YOUR Problem